Signs and symptoms

A dry, hard crust of dried blood and fluid that forms over a healing wound.

A sudden burst of abnormal electrical activity in the brain that changes movement, feeling, behavior or awareness.

Hearing loss from a problem in the cochlea, the hearing nerve or the brain's hearing pathway.

A pocket of serous fluid, the clear to pale yellow fluid part of the blood, that collects in a wound or under the skin after surgery or injury.

Eyes turned downward so that a strip of white shows above the colored part of the eye, like a sun setting below the horizon.

The feeling of not getting enough air or of having to work hard to breathe.

Something about a person's body that another person can see, hear, feel or measure, such as a fever, a rash or a fast pulse.

The findings of an illness taken together: what can be seen or measured (signs) and what the person feels and reports (symptoms).

A regular heart rhythm that starts normally in the sinus node but runs slower than 60 beats per minute.

A memory aid listing six things checked in a limb: pain, pallor, pulselessness, paresthesia, paralysis and poikilothermia (coldness).

A sudden, forceful burst of air out through the nose and mouth, set off by irritation inside the nose.

Rough, noisy breathing sounds made during sleep.

Pain, scratchiness or irritation of the throat, often worse when swallowing.

A sudden, involuntary tightening of a muscle or of the muscle in a hollow organ or tube.

Muscle stiffness and tightness that resists stretching, more strongly the faster a limb is moved.

Enlargement of the spleen.

A condition in which the eye muscles do not work together, so the eyes do not line up on the same point.

A swollen, red tongue with enlarged bumps on its surface, looking like a strawberry.

A high-pitched, harsh sound made while breathing, usually heard when breathing in.

A narrowing of the airway just below the vocal cords, inside the cricoid ring.

Thinking about, considering or planning suicide.

Confusion, restlessness or agitation that gets worse in the late afternoon and evening in some people with dementia.

Giving off salty fluid from glands in the skin, which cools the body as it dries.

An abnormal enlargement of a body part, often from fluid, blood or inflammation in the tissue.

Something a person feels and reports that others cannot see or measure, such as pain, nausea or dizziness.

Fainting: a short loss of consciousness from a drop in blood flow to the brain.