Typically guttate psoriasis erupts after a throat infection, or strep throat. Initially, when the throat infection has cleared up, the person can feel fine for several weeks before noticing the appearance of red spots. They appear small at first, like a dry red spot which is slightly itchy. When scratched or picked the top layer of dry skin is removed, leaving dry, red skin beneath with white, dry areas marking where flakes of dry skin stop and start. In the weeks that follow the spots can grow to as much as an inch in diameter. Some of the larger ones may form a pale area in the center which is slightly yellow.

Guttate psoriasis can occur on any part of the body, particularly the legs, arms, torso, eyelids, back, bottom, bikini-line and neck. The number of lesions can range from 5 to over 100. Generally the parts of the body most affected are seen on the arms, legs, back and torso.

Bacterial intertrigo can be caused by "Streptococci" and "Corynebacterium minutissimum".

Intertrigo refers to a type of inflammatory rash (dermatitis) of the superficial skin that occurs within a person's body folds. These areas are more susceptible to irritation and subsequent infection due to factors that promote skin breakdown such as moisture, friction, and exposure to bodily secretions such as sweat, urine or feces. Areas of the body which are more likely to be affected by intertrigo include the inframammary fold, intergluteal cleft, armpits, and spaces between the fingers or toes. Skin affected by intertrigo is more prone to infection than intact skin.

The term "intertrigo" commonly refers to a secondary infection with bacteria (such as "Corynebacterium minutissimum"), fungi (such as "Candida albicans"), or viruses. A frequent manifestation is candidal intertrigo.

Intertrigo occurs more often in warm and humid conditions. Generally, intertrigo is more common in people with a weakened immune system including children, the elderly, and immunocompromised people. The condition is also more common in people who experience urinary incontinence and decreased ability to move.

Candidal intertrigo is an infection of the skin by "Candida albicans", more specifically located between intertriginous folds of adjacent skin.

As the common name for this condition implies, it causes itching or a burning sensation in the groin area, thigh skin folds or anus. It may involve the inner thighs and genital areas, as well as extending back to the perineum and perianal areas.

Affected areas may appear red, tan, or brown, with flaking, rippling, peeling or cracking skin.

The acute infection begins with an area in the groin fold about a half-inch across, usually on both sides. The area may enlarge, and other sores may develop. The rash has sharply defined borders that may blister and ooze.

Tinea cruris does have similar symptoms to Inverse psoriasis.

Guttate psoriasis (also known as eruptive psoriasis) is a type of psoriasis that presents as small (0.5–1.5 cm in diameter) lesions over the upper trunk and proximal extremities; it is found frequently in young adults. The term "guttate" is used to describe the drop-like appearance of skin lesions. Guttate psoriasis is classically triggered by a bacterial infection, usually an upper respiratory tract infection.

Signs and symptoms of candidiasis vary depending on the area affected. Most candidal infections result in minimal complications such as redness, itching, and discomfort, though complications may be severe or even fatal if left untreated in certain populations. In healthy (immunocompetent) persons, candidiasis is usually a localized infection of the skin, fingernails or toenails (onychomycosis), or mucosal membranes, including the oral cavity and pharynx (thrush), esophagus, and the genitalia (vagina, penis, etc.); less commonly in healthy individuals, the gastrointestinal tract, urinary tract, and respiratory tract are sites of candida infection.

In immunocompromised individuals, "Candida" infections in the esophagus occur more frequently than in healthy individuals and have a higher potential of becoming systemic, causing a much more serious condition, a fungemia called candidemia. Symptoms of esophageal candidiasis include difficulty swallowing, painful swallowing, abdominal pain, nausea, and vomiting.

Thrush is commonly seen in infants. It is not considered abnormal in infants unless it lasts longer than a few weeks.

Infection of the vagina or vulva may cause severe itching, burning, soreness, irritation, and a whitish or whitish-gray cottage cheese-like discharge. Symptoms of infection of the male genitalia (balanitis thrush) include red skin around the head of the penis, swelling, irritation, itchiness and soreness of the head of the penis, thick, lumpy discharge under the foreskin, unpleasant odour, difficulty retracting the foreskin (phimosis), and pain when passing urine or during sex.

Common symptoms of gastrointestinal candidiasis in healthy individuals are anal itching, belching, bloating, indigestion, nausea, diarrhea, gas, intestinal cramps, vomiting, and gastric ulcers. Perianal candidiasis can cause anal itching; the lesion can be erythematous, papular, or ulcerative in appearance, and it is not considered to be a sexually transmissible disease. Abnormal proliferation of the candida in the gut may lead to dysbiosis. While it is not yet clear, this alteration may be the source of symptoms generally described as the irritable bowel syndrome, and other gastrointestinal diseases.

Streptococcal intertrigo is a cutaneous condition seen in infants and young children, characterized by a fiery-red erythema and maceration in the neck, axillae or inguinal folds.

It is characterized by outbreaks of rashes and blisters in the skin, usually in the folds of the skins, but also often over large areas of the body. The painful blisters break and sometimes become infected and raw, with new blisters forming over raw skin in a sometimes seemingly unending cycle of outbreaks.elapidated brick wall appearance

The rings are barely raised and are non-itchy. The face is generally spared.

It occurs in less than 5% of patients with rheumatic fever, but is considered a major Jones criterion when it does occur. The four other major criteria include carditis, polyarthritis, Sydenham's Chorea, and subcutaneous nodules. In this case, it is often associated with Group A streptococcal infection, otherwise known as "Streptococcus pyogenes" infection, which can be detected with an ASO titer.

It is an early feature of rheumatic fever and not pathognomonic of it. It may be associated with mild myocarditis (inflammation of heart muscle). It is also seen in conditions like allergic drug reactions, sepsis and glomerulonephritis.

It often occurs as a harbinger of attacks in hereditary angioedema. In this case it may occur several hours or up to a day before an attack.

Tinea cruris is similar to, but different from Candidal intertrigo, which is an infection of the skin by "Candida albicans". The latter is more specifically located between intertriginous folds of adjacent skin, which can be present in the groin or scrotum, and be indistinguishable from fungal infections caused by "tinea". However, candidal infections tend to both appear and with treatment disappear more quickly. It may also affect the scrotum.

Perianal cellulitis (also known as "Perineal dermatitis," and "Streptococcal perianal disease") is a cutaneous condition that presents as sharply demarcated, bright, perianal erythema extending 2–3 cm around the anal verge.

Cutaneous group B streptococcal infection may result in orbital cellulitis or facial erysipelas in neonates.

Candidiasis may be divided into these types:

- Mucosal candidiasis

- Oral candidiasis (thrush, oropharyngeal candidiasis)

- Pseudomembranous candidiasis

- Erythematous candidiasis

- Hyperplastic candidiasis

- Denture-related stomatitis — "Candida" organisms are involved in about 90% of cases

- Angular cheilitis — "Candida" species are responsible for about 20% of cases, mixed infection of "C. albicans" and "Staphylococcus aureus" for about 60% of cases.

- Median rhomboid glossitis

- Candidal vulvovaginitis (vaginal yeast infection)

- Candidal balanitis — infection of the glans penis, almost exclusively occurring in uncircumcised males

- Esophageal candidiasis (candidal esophagitis)

- Gastrointestinal candidiasis

- Respiratory candidiasis

- Cutaneous candidiasis

- Candidial folliculitis

- Candidal intertrigo

- Candidal paronychia

- Perianal candidiasis, may present as pruritus ani

- Candidid

- Chronic mucocutaneous candidiasis

- Congenital cutaneous candidiasis

- Diaper candidiasis: an infection of a child's diaper area

- Erosio interdigitalis blastomycetica

- Candidial onychomycosis (nail infection) caused by "Candida"

- Systemic candidiasis

- Candidemia, a form of fungemia which may lead to sepsis

- Invasive candidiasis (disseminated candidiasis) — organ infection by "Candida"

- Chronic systemic candidiasis (hepatosplenic candidiasis) — sometimes arises during recovery from neutropenia

- Antibiotic candidiasis (iatrogenic candidiasis)

Erythema nodosum is characterised by nodules (rounded lumps) below the skin surface, usually on the shins. These subcutaneous nodules can appear anywhere on the body, but the most common sites are the shins, arms, thighs, and torso. Each nodule typically disappears after around two weeks, though new one may continue to form for up to six or eight weeks. A new nodule usually appears red and is hot and firm to touch. The redness starts to fade and it gradually becomes softer and smaller until it disappears. Each nodule usually heals completely without scarring over the course of about two weeks. Joint pain and inflammation sometimes continues for several weeks or months after the nodules appear.

Less common variants of erythema nodosum include:

- Ulcerating forms, seen in Crohn's disease

- Erythema contusiforme, when a subcutaneous hemorrhage (bleeding under the skin) occurs with a erythema nodosum lesion, causing the lesion to look like a contusion (bruise)

- Erythema nodosum migrans (also known as subacute nodular migratory panniculitis), a rare form of chronic erythema nodosum characterized by asymmetrical nodules that are mildly tender and migrate over time.

Gianotti–Crosti syndrome mainly affects infants and young children. Children as young as 1.5 months and up to 12 years of age are reported to be affected. It is generally recognized as a papular or papulovesicular skin rash occurring mainly on the face and distal aspects of the four limbs. Purpura is generally not seen but may develop upon tourniquet test. However, extensive purpura without any hemorrhagic disorder has been reported. The presence of less lesions on the trunk does not exclude the diagnosis. Lymphadenopathy and hepatomegaly are sometimes noted. Raised AST and ALT levels with no rise in conjugated and unconjugated bilirubin levels are sometimes detectable, although the absence of such does not exclude the diagnosis. Spontaneous disappearance of the rash usually occurs after 15 to 60 days.

Hailey–Hailey disease, or familial benign chronic pemphigus or familial benign pemphigus, was originally described by the Hailey brothers (Hugh Edward and William Howard) in 1939. It is a genetic disorder that causes blisters to form on the skin.

The first signs of erythema nodosum are often flu-like symptoms such as a fever, cough, malaise, and aching joints. Some people also experience stiffness or swelling in the joints and weight loss.

The typical signs and symptoms of cellulitis is an area which is red, hot, and painful. The photos shown here of are of mild to moderate cases, and are not representative of earlier stages of the condition.

Pharyngitis is a type of inflammation, most commonly caused by an upper respiratory tract infection. It may be classified as acute or chronic. Acute pharyngitis may be catarrhal, purulent or ulcerative, depending on the causative agent and the immune capacity of the affected individual. Chronic pharyngitis may be catarrhal, hypertrophic or atrophic.

Tonsillitis is a sub type of pharyngitis. If the inflammation includes both the tonsils and other parts of the throat, it may be called pharyngotonsillitis. Another sub classification is nasopharyngitis (the common cold).

Clinical evaluation along with identification of typical symptoms such as the eruption of papules on the apocrine glands along with a patient history report is used to diagnose the disease. Surgical removal along with a microscopic evaluation by a dermatopatholgist is the most reliable form of diagnosis.

Symptoms may appear suddenly following any condition of heat, humidity, or friction. The apocrine glands (sweat glands) are the site of the Fox–Fordyce disease. Sudden appearance of raised bumps (papules) near the apocrine glands is characteristic of the disease. Papules are mostly skin colored, dome shaped, and itchy. Papules can be found at the sweat glands in addition to periareolar, inframammary and pubic areas. Hair follicles can become damaged as well and can result in hair loss in the affected area.

The differential diagnoses are: acrodermatitis enteropathica, erythema infectiosum, erythema multiforme, hand-foot-and-mouth disease, Henoch–Schönlein purpura, Kawasaki disease, lichen planus, papular urticaria, papular purpuric gloves and socks syndrome, and scabies.

Cellulitis is caused by a type of bacteria entering the skin, usually by way of a cut, abrasion, or break in the skin. This break does not need to be visible. Group A "Streptococcus" and "Staphylococcus" are the most common of these bacteria, which are part of the normal flora of the skin, but normally cause no actual infection while on the skin's outer surface.

About 80% of cases of Ludwig's angina, or cellulitis of the submandibular space, are caused by dental infections. Mixed infections, due to both aerobes and anaerobes, are commonly associated with this type of cellulitis. Typically, this includes alpha-hemolytic streptococci, staphylococci, and bacteroides groups.

Predisposing conditions for cellulitis include insect or spider bite, blistering, animal bite, tattoos, pruritic (itchy) skin rash, recent surgery, athlete's foot, dry skin, eczema, injecting drugs (especially subcutaneous or intramuscular injection or where an attempted intravenous injection "misses" or blows the vein), pregnancy, diabetes, and obesity, which can affect circulation, as well as burns and boils, though debate exists as to whether minor foot lesions contribute. Occurrences of cellulitis may also be associated with the rare condition hidradenitis suppurativa or dissecting cellulitis.

The appearance of the skin assists a doctor in determining a diagnosis. A doctor may also suggest blood tests, a wound culture, or other tests to help rule out a blood clot deep in the veins of the legs. Cellulitis in the lower leg is characterized by signs and symptoms similar to those of a deep vein thrombosis, such as warmth, pain, and swelling (inflammation).

This reddened skin or rash may signal a deeper, more serious infection of the inner layers of skin. Once below the skin, the bacteria can spread rapidly, entering the lymph nodes and the bloodstream and spreading throughout the body. This can result in influenza-like symptoms with a high temperature and sweating or feeling very cold with shaking, as the sufferer cannot get warm.

In rare cases, the infection can spread to the deep layer of tissue called the fascial lining. Necrotizing fasciitis, also called by the media "flesh-eating bacteria", is an example of a deep-layer infection. It is a medical emergency.