The symptoms may not appear for several days. The main symptom is the animal has a wet tail, matted with faeces. Other signs of the disease are:

- Smell/ foul odor

- Diarrhea

- Lethargy

- Lack of appetite

- Excess sleeping

- Walking with a hunched back

- Folded ears

- Unusual temper(biting or nipping)

Wet-tail or proliferative ileitis, is a disease of hamsters. It is precipitated by stress. Even with treatment, the animal can die within 48–72 hours. Baby hamsters are much more likely to get the disease than older hamsters. It commonly is found when the hamster is being weaned at about four weeks of age.

Body odor (American English) or body odour (British English; see spelling differences) is present in animals and humans, and its intensity can be influenced by many factors (behavioral patterns, survival strategies). Body odor has a strong genetic basis both in animals and humans, but it can be also strongly influenced by various diseases and physiological conditions. Body odor is generally considered to be an unpleasant odor among many human cultures.

Trimethylamine builds up in the bodies of patients with trimethylaminuria. The trimethylamine is released in the person's sweat, urine, reproductive fluids, and breath, giving off a strong fishy or body odor. Some people with trimethylaminuria have a strong odor all the time, but most have a moderate smell that varies in intensity over time. Individuals with this condition do not have any physical symptoms, and they typically appear healthy.

The condition seems to be more common in women than men, for unknown reasons. Scientists suspect that such female sex hormones as progesterone and estrogen aggravate the condition. According to several reports, the condition worsens around puberty. In women, symptoms may worsen just before and during menstrual periods, after taking oral contraceptives, and around menopause.

The odor seems to vary depending on many known factors, including diet, hormonal changes, stress level, amount of sweat, other odors in the space, and the observer's sense of smell.

Trimethylaminuria (TMAU; primary trimethylaminuria), also known as fish odor syndrome or fish malodor syndrome, is a rare metabolic disorder that causes a defect in the normal production of an enzyme named flavin-containing monooxygenase 3 ("FMO3"). When "FMO3" is not working correctly or if not enough enzyme is produced, the body loses the ability to properly convert trimethylamine (TMA) from precursor compounds in food digestion into trimethylamine oxide (TMAO), through a process called "N"-oxidation. Trimethylamine then builds up and is released in the person's sweat, urine, and breath, giving off a strong fishy odor or strong body odor. A variant of TMAU (secondary trimethylaminuria or TMAU2) exists where there is no genetic cause, yet excessive TMA is secreted, possibly due to intestinal dysbiosis, altered metabolism, or hormonal causes.

Merciful anosmia is a condition in which the person is unaware of the foul smell emanating from his own nose. This condition is seen in atrophic rhinitis. In atrophic rhinitis, the turbinates, venous sinusoids, seromucinous glands and nerves undergo atrophy, resulting in a foul smelling discharge. As the nerve fibres sensing smell are also atrophied, the patient is unable to appreciate the foul smell.

Dysmelia can refer to

- missing (aplasia) limbs: amelia, oligodactyly, congenital amputation e.g. Tibial or Radial aplasia

- malformation of limbs: shortening (micromelia, rhizomelia or mesomelia), ectrodactyly, phocomelia, meromelia, syndactyly, brachydactyly, club foot

- too many limbs: polymelia, polydactyly, polysyndactyly

- others: Tetraamelia, hemimelia, Symbrachydactyly

The foremost symptoms of saree cancer are the constant irritation with scaling and pigmentation change at the waistline; gradually these become chronic. The person may have non-healing ulcer or a hyper- or hypopigmented patch or a growth-like lesion over the waistline. The lesion may be associated with serous discharge with foul smell.

Dysmelia (from Gr. δυσ- "dys", "bad" + μέλ|ος "mél|os", "limb" + Eng. suff. -ia) is a congenital disorder of a limb resulting from a disturbance in embryonic development.

The onset of ORS may be sudden, where it usually follows after a precipitating event, or gradual.

Saree cancer is a type of skin cancer that occurs along the waistline in females wearing the saree, caused by constant irritation which can result in scaling and changes in pigmentation of the skin. It is a rare type of cancer and generally found in the Indian subcontinent, where sarees are commonly worn by girls and women throughout their lives. It is similar to Marjolin's ulcer in cause, involving chronic inflammation.

Deficiency of vitamin B (niacin) and zinc can cause problems with the endocrine system, which may cause taste loss or alteration. Disorders of the endocrine system, such as Cushing's syndrome, hypothyroidism and diabetes mellitus, can cause similar problems. Ageusia can also be caused by medicinal side-effects from antirheumatic drugs such as penicillamine, antiproliferative drugs such as cisplatin, ACE inhibitors, and other drugs including azelastine, clarithromycin, terbinafine, and zopiclone.

The defining feature of ORS is excessive thoughts of having offensive body odor(s) which are detectable to others. The individual may report that the odor comes from: the nose and/or mouth, i.e. halitosis (bad breath), the anus, the genitals, the skin generally, or specifically the groin, armpits or feet. The source(s) of the supposed odor may also change over time. There are also some who are unsure of the exact origin of the odor. The odor is typically reported to be continuously present. The character of the odor may be reported as similar to bodily substances, e.g. feces, flatus, urine, sweat, vomitus, semen, vaginal secretions; or alternatively it may be an unnatural, non-human or chemical odor, e.g. ammonia, detergent, rotten onions, burnt rags, candles, garbage, burning fish, medicines, old cheese. Again, the reported character of the odor complaint may change over time. Halitosis appears to be the most common manifestation of ORS, with 75% complaining of bad breath, alone or in combination with other odors. The next most common complaint was sweat (60%).

Although all individuals with ORS believe they have an odor, in some cases the individual reports they cannot perceive the odor themselves. In the latter cases, the belief arises via misinterpretation of the behavior of others or with the rationale that a disorder of smell which prevents self detection of the odor (i.e. anosmia) exists. In the cases where the non-existent odor can be detected, this is usually considered as phantosmia (olfactory hallucination). Olfactory hallucination can be considered the result of the belief in an odor delusion, or the belief a result of the olfactory hallucination. In one review, the individual with ORS was unreservedly convinced that he or she could detect the odor themselves in 22% of cases, whilst in 19% there was occasional or intermittent detection and in 59% lack of self-detection was present.

Some distinguish "delusional" and "non-delusional" forms of ORS. In the delusional type, there is complete conviction that the odor is real. In the non-delusional type, the individual is capable of some insight into the condition, and can recognize that the odor might not be real, and that their level of concern is excessive. Others argue that reported cases of ORS present a spectrum of different levels of insight. Since sometimes the core belief of ORS is not of delusional intensity, it is argued that considering the condition as a form of delusional disorder, as seems to occur in the DSM, is inappropriate. In one review, in 57% of cases the beliefs were fixed, held with complete conviction, and the individual could not be reassured that the odor was non existent. In 43% of cases the individual held the beliefs with less than complete conviction, and was able to varying degrees to consider the possibility that the odor was not existent.

Other symptoms may be reported and are claimed to be related to the cause of the odor, such as malfunction of the anal sphincter, a skin disease, "diseased womb", stomach problems or other unknown organic disease. Excessive washing in ORS has been reported to cause the development of eczema.

Local damage and inflammation that interferes with the taste buds or local nervous system such as that stemming from radiation therapy, glossitis, tobacco use, and denture use also cause ageusia. Other known causes include loss of taste sensitivity from aging (causing a difficulty detecting salty or bitter taste), anxiety disorder, cancer, renal failure and liver failure.

Tonsilloliths may produce no symptoms, or they may be associated with bad breath, or produce pain when swallowing.

Tonsilloliths occur more frequently in teens than in adults or young children. Many small tonsil stones do not cause any noticeable symptoms. Even when they are large, some tonsil stones are only discovered incidentally on X-rays or CAT scans.

Other symptoms include a metallic taste, throat closing or tightening, coughing fits, and choking.

Larger tonsilloliths may cause multiple symptoms, including recurrent halitosis, which frequently accompanies a tonsil infection, sore throat, white debris, a bad taste in the back of the throat, difficulty swallowing, ear ache, and tonsil swelling. A medical study conducted in 2007 found an association between tonsilloliths and bad breath in patients with a certain type of recurrent tonsillitis. Among those with bad breath, 75% of the subjects had tonsilloliths, while only 6% of subjects with normal halitometry values (normal breath) had tonsilloliths. A foreign body sensation may also exist in the back of the throat. The condition may also be an asymptomatic condition, with detection upon palpating a hard intratonsillar or submucosal mass.

Usog or balis is a topic in psycho-medicine in Filipino Psychology (but considered just as a Filipino superstition in Western Psychology) where an affliction or psychological disorder is attributed to a greeting by a stranger, or an evil eye hex. It usually affects an unsuspecting child, usually an infant or toddler, who has been greeted by a visitor or a stranger.

In some limited areas, it is said that the condition is also caused by the stranger having an evil eye or "masamang mata" in Tagalog, lurking around. This may have been influenced by the advent of the Spaniards who long believed in the "mal de ojo" superstition.

Once affected, the child begins to develop fever, and sometimes convulsions. Supposedly, the child can be cured by placing its clothing in hot water and boiling it. In most other places, to counter the effects of the "usog" the stranger or newcomer is asked to put some of his or her saliva on the baby's abdomen, shoulder or forehead before leaving the house. The newcomer then leaves while saying: ""Pwera usog... pwera usog..."" The saliva is placed on the finger first, before the finger is rubbed on the baby's abdomen or forehead. The stranger is never to lick the child. The practice is that the stranger or visitor is asked to touch his or her finger with saliva to the child's body, arm or foot (""lawayan"") to prevent the child from getting overpowered (""upang hindi mausog"").

Lick granuloma is a form of self-trauma and skin disorder in which most commonly dogs, but also cats, continuously lick a small area of their body until it becomes raw and inflamed. The most common areas affected are the lower (distal) portions of their legs, such as the carpus (wrist), or sometimes another part of their body such as the base of their tail.

The lesion can initially be red, shiny, swollen, hairless, irritated, and bleeding, similar to a hot spot (wet eczema). Eventually a raised hard plaque forms.

The condition can be known medically as bromhidrosis, apocrine bromhidrosis, osmidrosis, ozochrotia, fetid sweat, body smell, or malodorous sweating.

Osmidrosis or bromhidrosis is defined by a foul odor due to a water-rich environment that supports bacteria, which is caused by an abnormal increase in perspiration (hyperhidrosis). This can be particularly strong when it happens in the axillary region (underarms). In this case, the condition may be referred to an axillary osmidrosis.

Trimethylaminuria (TMAU), also known as fish odor syndrome or fish malodor syndrome, is a rare metabolic disorder where trimethylamine is released in the person's sweat, urine, and breath, giving off a strong fishy odor or strong body odor.

A lick granuloma, also known as acral lick dermatitis, is a skin disorder found most commonly in dogs, but also in cats. In dogs, it results typically from the dog's urge to lick the lower portion of one of his or her legs.

The lesion can initially be red, swollen, irritated, and bleeding, similar to a hot spot (wet eczema). The animal's incessant licking of the lesion eventually results in a thickened, firm, oval plaque, which is the granuloma.

A major cause of lick granuloma appears to be psychological, related to stress, anxiety, separation anxiety, boredom, or compulsiveness. Lick granulomas are especially seen in active dogs left alone for long periods of time. One theory is that excessive licking causes endorphin release, which reduces pain and makes the animal feel euphoric temporarily; that effect then causes an addiction to licking.

Other triggers include itchy skin, painful conditions caused by trauma to the skin, arthritis, neuralgia, and peripheral neuropathy. A bacterial or fungal infection of the skin can also trigger itching, as can skin mites, allergies, a reaction to an environmental irritant or toxin, hyperthyroidism, and certain types of cancer.

Treatment of the primary cause, if known, is essential. In psychogenic cases, psychological factors should be identified and addressed, such as being left alone all day, being confined, and changes in the household.

Tonsilloliths or tonsil stones are calcifications that form in the crypts of the palatal tonsils. They are also known to form in the throat and on the roof of the mouth. Tonsils are filled with crevices where bacteria and other materials, including dead cells and mucus, can become trapped. When this occurs, the debris can become concentrated in white formations that occur in the pockets. Tonsilloliths are formed when this trapped debris accumulates and are expressed from the tonsil. They are generally soft, sometimes rubbery. This tends to occur most often in people who suffer from chronic inflammation in their tonsils or repeated bouts of tonsillitis. They are often associated with post-nasal drip.

Presentation includes telangiectasia, acanthosis, and hyperkeratosis.

Presentation can be solitary or systemic.

The olfactory system is the system related to the sense of smell (olfaction). Many fish activities are dependent on olfaction, such as: mating, discriminating kin, avoiding predators, locating food, contaminant avoidance, imprinting and homing. These activities are referred to as “olfactory-mediated.” Impairment of the olfactory system threatens survival and has been used as an ecologically relevant sub-lethal toxicological endpoint for fish within studies. Olfactory information is received by sensory neurons, like the olfactory nerve, that are in a covered cavity separated from the aquatic environment by mucus. Since they are in almost direct contact with the surrounding environment, these neurons are vulnerable to environmental changes. Fish can detect natural chemical cues in aquatic environments at concentrations as low as parts per billion (ppb) or parts per trillion (ppt).

Studies have shown that exposures to metals, pesticides, or surfactants can disrupt fish olfaction, which can impact their survival and reproductive success. Many studies have indicated copper as a source of olfactory toxicity in fishes, among other common substances. Olfactory toxicity can occur by multiple, complex Modes of Toxic Action.

In some instances nodular angiokeratomas can produce necrotic tissue and valleys that can harbor fungal, bacterial and viral infections. Infections can include staphylococcus. If the lesion becomes painful, begins draining fluids or pus, or begins to smell, consult a physician. In these instance a doctor may recommend excision and grafting.

One theory (Kristina Palacio) explains "usog" in terms of child distress that leads to greater susceptibility to illness and diseases. There are observations that a stranger (or a newcomer or even a visiting relative) especially someone with a strong personality (physically big, boisterous, has strong smell, domineering, etc.) may easily distress a child. Thus, the child is said to be "overpowered" or "nauusog" and thus may feel afraid, develop fever, get sick, etc.

In "usog", the child's distress is the consequence of the child's failure to adapt to change. It is, in medical terms, the consequence of the disruption of homeostasis through physical or psychological stimuli brought about by the stranger. Technically, the condition results from the child-environment interaction that leads the child to perceive a painful discrepancy, real or imagined, between the demands of a situation on the one hand and their social, biological, or psychological resources on the other. The stressful stimuli to the child may be mental (stranger is perceived as a threat, malevolent or demanding), physiological (loud and/or high-pitched voice of the stranger that is hurting to the child's eardrum; strong smell of the stranger that irritates the child's nasal nerves), or physical (stranger has heavy hands or is taking up too much space).

The stranger's act of gently placing his finger with his saliva to the child's arm, foot, or any particular part of the child's body, could make him more familiar to the child, and thus, reduce if not remove the stress. As the stranger keeps gently saying, "Pwera usog... pwera usog...," the child is made to feel and assured that he means no harm. The "usog" is said to be counteracted because the child is prevented from succumbing to an illness since the child is no longer in distress. Children or even adults who are shy or have weak personalities are more susceptible to "usog" in accordance with observations and theory. Some have observed that at times even praising a shy child by a visiting relative caused an "usog".

The saliva from the stranger, granted that he or she is healthy and consistent with his or her oral hygiene, is relatively clean and contains enough antimicrobial compounds such as lactoferrin, lactoperoxidase, and secretory immunoglobulin A which can help clear pathogens from the child and benefit the child against infection. Furthermore, human saliva has opiorphin, a newly researched pain-killing substance. Initial research with mice shows the compound has a painkilling effect of up to six times that of morphine. It works by stopping the normal breakdown of natural pain-killing opioids in the spine, called enkephalins. Opiorphin in human saliva is a relatively simple molecule, and the child's immune system may trigger a biochemical cascade (complement system) to produce other stress-reducing compounds.

Usog can also, though less commonly, affect adults, and it may induce vomiting and stomach ache rather than fever. Supposedly, it can be prevented by stopping a stranger or visitor from greeting the person.

Unlike "lihi", however, usog is not yet medically accepted. More than the superstitious folks, researchers dealing with Filipino Psychology say they have observed this phenomenon with regularity and suggest that this be added to the Psychiatric Disorders Handbook DSM-V.

People with hypermethioninemia often do not show any symptoms. Some individuals with hypermethioninemia exhibit learning disabilities, mental retardation, and other neurological problems; delays in motor skills such as standing or walking; sluggishness; muscle weakness; liver problems; unusual facial features; and their breath, sweat, or urine may have a smell resembling boiled cabbage.

Hypermethioninemia can occur with other metabolic disorders, such as homocystinuria, tyrosinemia and galactosemia, which also involve the faulty breakdown of particular molecules. It can also result from liver disease or excessive dietary intake of methionine from consuming large amounts of protein or a methionine-enriched infant formula.