Symptom, Sign and Side Effect Terms

Symptoms people experience, clinical signs, and unwanted effects of illness or treatment. Browse definitions and meanings below.

101 terms

Terms in this topic

Alphabetical order
  • The medical name for a nosebleed, and one of the few bleeding sites where the exact spot decides how easily it stops.

  • Pressing on the area is the quickest test, since redness from widened vessels fades under a finger and bleeding into skin does not.

  • On its own the word describes a mood, not a diagnosis; what matters clinically is what produced it and how long it lasts.

  • Persistent exhaustion that does not fully resolve with rest, fatigue can arise from physical illness, psychological strain, or simply insufficient sleep.

  • Fever is a rise in body temperature above an individual's normal baseline, usually triggered by infection or another underlying inflammatory process.

  • It moves in waves rather than through tidy stages, and shows up in sleep, appetite and concentration as much as in mood.

  • Which sense is involved narrows the cause sharply, because heard voices and seen figures point in quite different clinical directions.

  • Most murmurs are harmless noise from normal blood flow, which is why the character of the sound matters more than its presence.

  • The name is a misnomer, and the overlap with chest pain from the heart is exactly why the two are so often confused.

  • A bruise stains the tissue, while a hematoma occupies space, and the trouble it causes comes mostly from what it presses on.

  • Color is a poor guide here, since beets and some medicines redden urine while a serious cause may leave it looking normal.

  • In heavy bleeding it is the flooding of the airways, not the volume of blood lost, that does the damage.

  • hepatomegaly

    / HEH-puh-toh-MEH-guh-lee /

    Hepatomegaly is enlargement of the liver beyond its expected size.

  • More glucose circulating than the body can move into its cells, a state with several causes besides diabetes.

  • Welts that move: individual patches fade within a day while new ones rise elsewhere, which is what separates them from most other rashes.

  • Activity above the normal level, whether that means a restless child or a gland working far too hard.

  • Often blamed on nerves, but the same pattern is one of the earliest warnings of serious illness elsewhere in the body.

  • hypotension

    / hy-poh-TEN-shun /

    Blood pressure that is lower than expected for a person or situation.

  • Oxygen can fail tissue at several points along its journey, and where the failure happens defines the type of hypoxia.

  • An adjective rather than a diagnosis, it labels how much oxygen a place holds, from a whole body to one tumor core.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.