Symptoms

Fatigue is a state of being without energy for a prolonged period of time. Fatigue is used in two contexts: in the medical sense, and in the sense of normal tiredness.

Lethargy is a state of tiredness, sleepiness, weariness, fatigue, sluggishness, or lack of energy. It can be accompanied by depression, decreased motivation, or apathy. Lethargy can be a normal response to inadequate sleep, overexertion, overworking, stress, lack of exercise, improper nutrition, drug abuse, boredom, or a symptom of an underlying illness or disorder. It may also be a side effect of medication or caused by an interaction between medications and alcohol. It may also be an altered level of consciousness.

thumb|right|Rheum from a cat's eyes Rheum (; from Greek: ῥεῦμα rheuma 'a flowing, rheum') is a thin mucus naturally discharged from the eyes, nose, or mouth, often during sleep (contrast with mucopurulent discharge). Rheum dries and gathers as a crust in the corners of the eyes or the mouth, on the eyelids, or under the nose. It is formed by a combination of mucus (in the case of the eyes, consisting of mucin discharged from the cornea or the conjunctiva), nasal mucus, blood cells, skin cells, or dust.

medical condition

Hematemesis is the vomiting of blood. It can be confused with hemoptysis (coughing up blood) or epistaxis (nosebleed), which are more common. The source is generally the upper gastrointestinal tract, typically above the suspensory muscle of duodenum. It may be caused by ulcers, tumors of the stomach or esophagus, varices, prolonged and vigorous retching, gastroenteritis, ingested blood (from bleeding in the mouth, nose, or throat), or certain drugs. However, this is not found in stomach viruses (norovirus, rotovirus, etc.)

Torticollis, also known as wry neck, is an extremely painful, dystonic condition defined by an abnormal, asymmetrical head or neck position, which may be due to a variety of causes. The term torticollis is derived .

In medicine, a prodrome is an early sign or symptom (or set of signs and symptoms, referred to as prodromal symptoms) that often indicates the onset of a disease before more diagnostically specific signs and symptoms develop. More specifically, it refers to the period between the first recognition of a disease's symptom until it reaches its more severe form. It is derived from the Greek word prodromos, meaning "running before". Prodromes may be non-specific symptoms or, in a few instances, may clearly indicate a particular disease, such as the prodromal migraine aura.

thumb|250px|right|Pulmonary contusion due to trauma is an example of a condition that can be asymptomatic with half of people showing no signs at the initial presentation. The [[CT scan shows a pulmonary contusion (red arrow) accompanied by a rib fracture (purple arrow).]]

Hematospermia (also known as haematospermia, hemospermia, or haemospermia) is the presence of blood in the ejaculate. It is most often a benign symptom. Among men age 40 or older, hematospermia is a slight predictor of cancer, typically prostate cancer. No specific cause is found in up to 70% of cases.

Pathognomonic (synonym pathognomic) is a term, often used in medicine, that means "characteristic for a particular disease". A pathognomonic sign is a particular sign whose presence means that a particular disease is present beyond any doubt. The absence of a pathognomonic sign does not rule out the disease. Labelling a sign or symptom "pathognomonic" represents a marked intensification of a "diagnostic" sign or symptom.

human disease

reaction to endotoxin-like products released by the death of harmful microorganisms within the body during antimicrobial treatment

clinical symptom or sign as a first-order metaclass: to be used as P31 values for all symptom or sign classes, and instances are classes (e. g. sneezing or coughing)

Macropsia is a neurological condition affecting human visual perception, in which objects within an affected section of the visual field appear larger than normal, causing the person to feel smaller than they actually are. Macropsia, along with its opposite condition, micropsia, can be categorized under dysmetropsia. Macropsia is related to other conditions dealing with visual perception, such as aniseikonia and Alice in Wonderland Syndrome (AIWS, also known as Todd's syndrome). Macropsia has a wide range of causes, from prescription and illicit drugs, to migraines and (rarely) complex partial

callus on the forehead of some Muslims

painless temporary loss of vision in one or both eyes

an acute respiratory illness with a measured temperature of 38 °C or greater and cough

Haemolacria or hemolacria is a physical condition that causes a person to produce tears that are partially composed of blood.

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an infection that is nearly or completely asymptomatic that may enable a pathogen to escape clinical attention or inclusion in health statistics

appearance of swelling in the tissues around the eyes

In medicine, an exacerbation is the worsening of a disease or an increase in its symptoms. Examples includes an acute exacerbation of chronic obstructive pulmonary disease and acute exacerbation of congestive heart failure.

principal reason for a person seeking professional assistance

measurement used to assess pain for children or those unable to communicate their pain

form of obsessive–compulsive disorder focusing on close or intimate relationships

thumb|A horse with phrenitis, 1678. Lld manuscript from the Deutsche Fotothek

medical condition

burnout associated with overuse of virtual platforms

Any of various diseases that seem similar to others in their signs and symptoms

sound-induced vertigo

A sniffle is the instinctive action of inhaling quickly in order to prevent mucus from flowing from one's nasal cavity, as an alternative to blowing the nose.

symptom of chronic fatigue syndrome

coordinated view of behavioral changes, due to feeling sick, bedridden, or under the weather

Bronchorrhea is the production of more than 100 mL per day of watery sputum. Chronic bronchitis is a common cause, but it may also be caused by asthma, pulmonary contusion,