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
  • Daytime consequences rather than hours counted are what define it, since a short sleeper without them does not have insomnia.

  • A sensation with a nerve pathway of its own, not a mild form of pain, and sometimes a sign of something outside the skin.

  • In everyday speech it means tired; in a clinical note it means the level of consciousness itself has dropped, which is a different claim.

  • Lhermitte's sign is an electric shock like sensation down the spine triggered by bending the neck forward, pointing to spinal cord irritation.

  • Bleeding heavy enough to disrupt daily life often traces to fibroids, hormone shifts or an inherited clotting problem, and steadily drains iron.

  • A taste of coins or blood with nothing metal in the mouth, arising from the taste and smell pathways rather than the food.

  • Swelling of the abdomen caused by gas in the intestines or peritoneal cavity.

  • Muscle shrinking because it is not being used, not being fed, or is being broken down faster than the body rebuilds it.

  • Whether the ache sits in one muscle or everywhere at once is the first question, because the two lists of causes barely overlap.

  • Nausea is an uncomfortable stomach sensation often preceding vomiting, with causes ranging from motion and illness to medication and pregnancy.

  • Pain with no injury underneath it, which is why ordinary painkillers disappoint and drugs built for epilepsy and depression do not.

  • Most are found by accident on imaging ordered for something else entirely, and most of those turn out to mean nothing at all.

  • Sensation reduced or absent in an area, which is a different finding from the tingling and pins and needles it is often confused with.

  • The point at which a person becomes aware of pain.

  • The heart is normally silent to its owner, so noticing it at all is what turns an ordinary beat into a symptom.

  • Papilledema is swelling of the optic disc caused by raised pressure inside the skull, visible on examination of the eye.

  • Paralysis is the loss of voluntary muscle movement in part of the body, resulting from a disruption in the nerve signals that control it.

  • The distribution of the tingling carries most of the information, since it maps onto whichever nerve or nerve root is affected.

  • The sensation of pain or other unpleasant feelings in the place of a missing (phantom) limb.

  • One word, three unrelated meanings: a skin lesion, a fatty deposit inside an artery, and the bacterial film that coats teeth.

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.