Bunion can be diagnosed and analyzed by plain projectional radiography. The "hallux valgus angle" (HVA) is the angle between the longitudinal axes of the proximal phalanx and the first metatarsal bone of the big toe. It is considered abnormal if greater than 15–18°. The following HVA angles can also be used to grade the severity of hallux valgus:

- Mild: 15–20°

- Moderate: 21–39°

- Severe: ≥ 40°

The "intermetatarsal angle" (IMA) is the angle between the longitudinal axes of the first and second metatarsal bones, and is normally less than 9°. The IMA angle can also grade the severity of hallux valgus as:

- Mild: 9–11°

- Moderate: 12–17°

- Severe: ≥ 18°

Asymptomatic anatomical variations in feet generally do not need treatment.

Conservative treatment for foot pain with Morton's toe may involve exercises or placing a flexible pad under the first toe and metatarsal; an early version of the latter treatment was once patented by Dudley Joy Morton. Restoring the Morton’s toe to normal function with proprioceptive orthotics can help alleviate numerous problems of the feet such as metatarsalgia, hammer toes, bunions, Morton's neuroma, plantar fasciitis, and general fatigue of the feet. Rare cases of disabling pain are sometimes treated surgically.

Initial diagnosis often is made during routine physical examination. Such diagnosis can be confirmed by a medical professional such as a neurologist, orthopedic surgeon or neurosurgeon. A person with foot drop will have difficulty walking on his or her heels because he will be unable to lift the front of the foot (balls and toes) off the ground. Therefore, a simple test of asking the patient to dorsiflex may determine diagnosis of the problem. This is measured on a 0-5 scale that observes mobility. The lowest point, 0, will determine complete paralysis and the highest point, 5, will determine complete mobility.

There are other tests that may help determine the underlying etiology for this diagnosis. Such tests may include MRI, MRN, or EMG to assess the surrounding areas of damaged nerves and the damaged nerves themselves, respectively. The nerve that communicates to the muscles that lift the foot is the peroneal nerve. This nerve innervates the anterior muscles of the leg that are used during dorsi flexion of the ankle. The muscles that are used in plantar flexion are innervated by the tibial nerve and often develop tightness in the presence of foot drop. The muscles that keep the ankle from supination (as from an ankle sprain) are also innervated by the peroneal nerve, and it is not uncommon to find weakness in this area as well. Paraesthesia in the lower leg, particularly on the top of the foot and ankle, also can accompany foot drop, although it is not in all instances.

A common yoga kneeling exercise, the Varjrasana has, under the name "yoga foot drop," been linked to foot drop.

Conservative treatment for bunions include changes in footwear, the use of orthotics (accommodative padding and shielding), rest, ice, and pain medications such as acetaminophen or nonsteroidal anti-inflammatory drugs. These treatments address symptoms but do not correct the actual deformity. If the discomfort persists and is severe or when aesthetic correction of the deformity is desired, surgical correction by an orthopedic surgeon or a podiatric surgeon may be necessary.

In many cases, conservative treatment consisting of physical therapy and new shoes with soft, spacious toe boxes is enough to resolve the condition, while in more severe or longstanding cases Hammertoe Surgery may be necessary to correct the deformity. The patient's doctor may also prescribe some toe exercises that can be done at home to stretch and strengthen the muscles. For example, the individual can gently stretch the toes manually, or use the toes to pick things up off the floor. While watching television or reading, one can put a towel flat under the feet and use the toes to crumple it. The doctor can also prescribe a brace that pushes down on the toes to force them to stretch out their muscles.

Magnetic Resonance Imaging (MRI) produces a 3-dimensional image that allows for exceptional evaluation of soft tissue structures, as well as the detection of boney change and the presence of excessive fluid accumulation associated with inflammation. Like CT, an MRI image may be viewed in various planes of orientation, improving visualization of anatomic structures and any associated pathologic change. MRI is considered the gold standard for diagnosing soft tissue injury within the foot. While it can provide a definitive diagnosis in cases where other imaging modalities have failed, it does have several limitations. Available magnet size restricts imaging to the level of the stifle or elbow, or below. MRI takes a significant amount of time acquire an image, which translates to long anesthesia times and therefore reduces the size of the area that may be imaged in a single session. The area thought to be associated with lameness must be placed in the MRI. MRI is therefore inappropriate for any lameness that can not be localized to a specific region of the limb. Additionally, MRI has limited availability and high cost compared to the other imaging modalities.

Horses may undergo standing MRI, where the horse is sedated and imaged with a low-field magnet (0.27 Tesla), or it may be placed in a high-field magnet (1.5 or 3 Tesla) while under general anesthesia. Low-field magnets produce less resolution and the subtle swaying of the standing horse leads to motion artifact (blurring of the image), especially in the case of the knee or hock, leading to reduced image quality. However, standing MRI tends to be cheaper, and it eliminates the risks of general anesthesia, such as further damage to the injured area or additional injury that may occur during anesthetic recovery.

Computed tomography (CT) is an imaging modality that produces a 3-dimensional radiograph. A series of plain radiographs are taken in a spiral around the site of interest, and the individual 2-D radiographs are converted into a 3-D image by a computer. The image may be manipulated to view in different planes, such as cross-section, making it possible to see an injury from multiple perspectives and improving diagnostic capabilities when compared to plain radiographs. Like plain radiographs, CT is not as useful for soft tissue lesions when compared to boney lesions. However, CT requires general anesthesia, and is more costly and less available than plain radiographs, limiting its use in general practice. CT provides a large amount of data with exceptional speed, taking only seconds to minutes to complete. When compared to MRI, it is not only significantly faster (MRI takes 1–2 hours to produce an image), but also less expensive. Its combination of speed and imaging capabilities makes it beneficial for use prior to orthopedic surgery, especially in the case of complicated fractures, as it allows for visualization from all sides so that the surgeon may determine the best approach and method of correction prior to cutting. Upon completion of the CT, the horse may be rolled straight into the surgery suite for immediate surgical treatment.

Most flexible flat feet are asymptomatic, and do not cause pain. In these cases, there is usually no cause for concern. Flat feet were formerly a physical-health reason for service-rejection in many militaries. However, three military studies on asymptomatic adults (see section below), suggest that persons with asymptomatic flat feet are at least as tolerant of foot stress as the population with various grades of arch. Asymptomatic flat feet are no longer a service disqualification in the U.S. military.

In a study performed to analyze the activation of the tibialis posterior muscle in adults with pes planus, it was noted that the tendon of this muscle may be dysfunctional and lead to disabling weightbearing symptoms associated with acquired flat foot deformity. The results of the study indicated that while barefoot, subjects activated additional lower-leg muscles to complete an exercise that resisted foot adduction. However, when the same subjects performed the exercise while wearing arch supporting orthotics and shoes, the tibialis posterior was selectively activated. Such discoveries suggest that the use of shoes with properly fitting, arch-supporting orthics will enhance selective activation of the tibialis posterior muscle thus, acting as an adequate treatment for the undesirable symptoms of pes planus.

Rigid flatfoot, a condition where the sole of the foot is rigidly flat even when a person is not standing, often indicates a significant problem in the bones of the affected feet, and can cause pain in about a quarter of those affected. Other flatfoot-related conditions, such as various forms of tarsal coalition (two or more bones in the midfoot or hindfoot abnormally joined) or an accessory navicular (extra bone on the inner side of the foot) should be treated promptly, usually by the very early teen years, before a child's bone structure firms up permanently as a young adult. Both tarsal coalition and an accessory navicular can be confirmed by X-ray. Rheumatoid arthritis can destroy tendons in the foot (or both feet) which can cause this condition, and untreated can result in deformity and early onset of osteoarthritis of the joint. Such a condition can cause severe pain and considerably reduced ability to walk, even with orthoses. Ankle fusion is usually recommended.

Treatment of flat feet may also be appropriate if there is associated foot or lower leg pain, or if the condition affects the knees or the lower back. Treatment may include using orthoses such as an arch support, foot gymnastics or other exercises as recommended by a podiatrist/orthotist or physical therapist. In cases of severe flat feet, orthoses should be used through a gradual process to lessen discomfort. Over several weeks, slightly more material is added to the orthosis to raise the arch. These small changes allow the foot structure to adjust gradually, as well as giving the patient time to acclimatise to the sensation of wearing orthoses. Once prescribed, orthoses are generally worn for the rest of the patient's life. In some cases, surgery can provide lasting relief, and even create an arch where none existed before; it should be considered a last resort, as it is usually very time consuming and costly.

A doctor will typically evaluate whether there is bilateral (both legs) toe walking, what the child's range of motion is (how far they can flex their feet) and perform a basic neurological exam. Treatment will depend on the cause of the condition.

Studies have been performed to determine the source of the association between toe walking and cerebral palsy patients. One study suggests that the toe walking—sometimes called an equinus gait—associated with cerebral palsy presents with an abnormally short medial and lateral gastrocnemius and soleus—the primary muscles involved in plantarflexion. A separate study found that the gait could be a compensatory movement due to weakened plantarflexion muscles. The study performed clinical studies to determine that a greater plantarflexion force is required for normal heel-to-toe walking than for toe walking. Able bodied children were tasked to perform gaits at different levels of toe walking and the study discovered that their toe walking could not reduce the force to the levels that cerebral palsy patients indicated in their walk. This suggests that cerebral palsy in which an equinus gait is present may be due to abnormally weakened plantarflexion that can only manage toe walking.

Most of these conditions are self-correcting during childhood. In the worst cases, surgery may be needed. Most of the time, this involves lengthening the Achilles tendon. Less severe treatment options for pigeon toe include keeping a child from crossing his or her legs, use of corrective shoes, and casting of the foot and lower legs, which is normally done before the child reaches 12 months of age or older.

If the pigeon toe is mild and close to the center, treatment may not be necessary.

Ballet has been used as a treatment for mild cases. Dance exercises can help to bend the legs outward.

Morton's Toe is a minority variant of foot shape. Its recorded prevalence varies in different populations, with estimates from 2.95% to 22%.

The injury can be debilitating for athletes of many sports who need to accelerate, quickly change direction, or jump. Use of the toes is not possible during the healing process. Since the toes are necessary for proper push-off when accelerating, those sorts of athletic activities should be almost completely curtailed. An extended healing period of one or more months is often required.

Because of the anatomy of the distal foot and the unique use of the foot, it is often impossible to properly tape or brace the joint. Although difficult, it is not impossible to tape the toe to limit extension (upward bend of toe). Additionally, wearing a shoe with a rigid sole (often a metal plate) and cushioned innersole will help minimize extension of the joint. Anti-inflammatory medication as well as physical therapy is recommended.

Turf toe is usually healed in about 2–3 weeks. It can become more serious if left untreated, and may cause serious problems for the athlete. Treating the injury includes icing of the area, elevating the foot, or possibly the use of custom orthotics.

Training of the feet, utilizing foot gymnastics and going barefoot on varying terrain, can facilitate the formation of arches during childhood, with a developed arch occurring for most by the age of four to six years. Ligament laxity is also among the factors known to be associated with flat feet. One medical study in India with a large sample size of children who had grown up wearing shoes and others going barefoot found that the longitudinal arches of the bare-footers were generally strongest and highest as a group, and that flat feet were less common in children who had grown up wearing sandals or slippers than among those who had worn closed-toe shoes. Focusing on the influence of footwear on the prevalence of pes planus, the cross-sectional study performed on children noted that wearing shoes throughout early childhood can be detrimental to the development of a normal or a high medial longitudinal arch. The vulnerability for flat foot among shoe-wearing children increases if the child has an associated ligament laxity condition. The results of the study suggest that children be encouraged to play barefooted on various surfaces of terrain and that slippers and sandals are less harmful compared to closed-toe shoes. It appeared that closed-toe shoes greatly inhibited the development of the arch of the foot more so than slippers or sandals. This conclusion may be a result of the notion that intrinsic muscle activity of the arch is required to prevent slippers and sandals from falling off the child’s foot.

The tibia or lower leg slightly or severely twists inward when walking or standing.

Non-surgical therapies include:

- Shoe modifications: wearing shoes that have a wide toe box, and avoiding those with pointed toes or high heels.

- Oral nonsteroidal anti-inflammatory drugs may help in relieving the pain and inflammation.

- Injections of corticosteroid are commonly used to treat the inflammation.

- Bunionette pads placed over the affected area may help reduce pain.

- An ice pack may be applied to reduce pain and inflammation.

Surgery is often considered when pain continues for a long period with no improvement in these non-surgical therapies.

Putting the foot into proper neurological and biomechanical balance is crucial. Often navicular horses have long toes and underrun heels with very little inner wall depth or strength. Exposing the horse to proper stimulus to improve hoof form and structure is also vital.

The issue of hoof care is a subject of great debate. Corrective shoeing can be beneficial to horses suffering from navicular disease, although sometimes the effects are only temporary. Others believe that removing the shoes altogether is the best way to manage this disease, as it allows increased circulation to the hoof. People on both sides agree that proper hoof shape and angle are an important long-term management plan for a horse with navicular disease. As with laminitis, different horses may respond in different ways to a given technique, so the farrier, owner, and veterinarian should work as a team to formulate a plan and to adapt if the initial plan is not effective.

People who choose to treat navicular disease through shoeing may use a shoe designed to lift and support the heels. This can sometimes be accomplished with a flat shoe and trimming alone. Wedge pads or wedged shoes are often used, but can amplify heel-related problems if present. Another strategy is to use a bar type shoe. Often, an egg-bar shoe, or straight bar shoe. Some horses benefit from shoes that change the breakover of their foot (like a rolled toe). With or without shoes, the hoof must be trimmed in such a way as to restore the balance and angle that may have been lost. Horses with long toe-low heel conformation need careful trimming to counter this. Horses with upright feet may need their heels lowered and a shoe that will allow their heels to spread. Early intervention is key; in one study, shoeing was successful in 97% of horses treated within ten months of the onset of signs, while only 54% of horses lame for over a year responded.

Advocates of barefoot trimming cite recent studies which show that removing the shoes can help alleviate the symptoms of navicular disease, and in some cases, reverse some of the damage done to the hoof. Because navicular disease can be caused, or at least exacerbated by shoeing, removing the cause is the first step in this strategy toward the management of pain in the animal. Successive carefully applied trims help to restore the natural angle and shape of the hoof, while walking helps to stimulate circulation to the hoof. It is not uncommon to find horses whose navicular disease is completely manageable through corrective barefoot trimming. However, this may require a transition period lasting from weeks to years where the horse may remain lame, or may never become sound.

If there is significant degeneration in the bone, a flexor cortex cyst, adhesions to the deep digital flexor tendon, or avulsion fractures, relief is typically incomplete no matter what foot care technique is used.

Hammer toe most frequently results from wearing poorly fitting shoes that can force the toe into a bent position, such as excessively high heels or shoes that are too short or narrow for the foot. Having the toes bent for long periods of time can cause the muscles in them to shorten, resulting in the hammer toe deformity. This is often found in conjunction with bunions or other foot problems (e.g., a bunion can force the big toe to turn inward and push the other toes). It can also be caused by muscle, nerve, or joint damage resulting from conditions such as osteoarthritis, rheumatoid arthritis, stroke, Charcot–Marie–Tooth disease, complex regional pain syndrome or diabetes. Hammer toe can also be found in Friedreich's ataxia (GAA trinucleotide repeat).

Early treatment for mild cases of hallux rigidus may include prescription foot orthotics, shoe modifications (to take the pressure off the toe and/or facilitate walking), medications (anti-inflammatory drugs), injection therapy (corticosteroids to reduce inflammation and pain) and/or physical therapy.

Buck-Gramcko described another operation technique, for treatment of radial dysplasia, which is called radialization. During radialization the metacarpal of the index finger is pinned onto the ulna and radial wrist extensors are attached to the ulnar side of the wrist, causing overcorrection or ulnar deviation. This overcorrection is believed to make relapse of radial deviation less likely.

In some cases, surgery is the only way to eliminate or reduce pain. There are several types of surgery for treatment of hallux rigidus. The type of surgery is based on the stage of hallux rigidus.

More severe types (Bayne type III en IV) of radial dysplasia can be treated with surgical intervention. The main goal of centralization is to increase hand function by positioning the hand over the distal ulna, and stabilizing the wrist in straight position. Splinting or soft-tissue distraction may be used preceding the centralization.

In classic centralization central portions of the carpus are removed to create a notch for placement of the ulna. A different approach is to place the metacarpal of the middle finger in line with the ulna with a fixation pin.

If radial tissues are still too short after soft-tissue stretching, soft tissue release and different approaches for manipulation of the forearm bones may be used to enable the placement of the hand onto the ulna. Possible approaches are shortening of the ulna by resection of a segment, or removing carpal bones. If the ulna is significantly bent, osteotomy may be needed to straighten the ulna. After placing the wrist in the correct position, radial wrist extensors are transferred to the extensor carpi ulnaris tendon, to help stabilize the wrist in straight position. If the thumb or its carpometacarpal joint is absent, centralization can be followed by pollicization. Postoperatively, a long arm plaster splinter has to be worn for at least 6 to 8 weeks. A removable splint is often worn for a long period of time.

Radial angulation of the hand enables patients with stiff elbows to reach their mouth for feeding; therefore treatment is contraindicated in cases of extension contracture of the elbow. A risk of centralization is that the procedure may cause injury to the ulnar physis, leading to early epiphyseal arrest of the ulna, and thereby resulting in an even shorter forearm. Sestero et al. reported that ulnar growth after centralization reaches from 48% to 58% of normal ulnar length, while ulnar growth in untreated patients reaches 64% of normal ulnar length. Several reviews note that centralization can only partially correct radial deviation of the wrist and that studies with longterm follow-up show relapse of radial deviation.

A metatarsophalangeal joint sprain is an injury to the connective tissue between the foot and one of the toes. When the big toe is involved, it is known as "turf toe".

Tailor's bunion, or bunionette, is a condition caused as a result of inflammation of the fifth metatarsal bone at the base of the little toe.

It is mostly similar to a bunion (the same type of ailment affecting the big toe). It is called Tailor's Bunion because in past centuries, tailors sat cross-legged, and this was thought to cause this protrusion on the outside aspect of the foot.

It is usually characterized by inflammation, pain and redness of the little toe.

Often a tailor's bunion is caused by a faulty mechanical structure of the foot. The fifth metatarsal bone starts to protrude outward, while the little toe moves inward. This change in alignment creates an enlargement on the outside of the foot.

Tailor's bunion is easily diagnosed because the protrusion is visually apparent. X-rays may be ordered to help the surgeon find out the severity of the deformity.