Signs and symptoms

Signs and symptoms are diagnostic indications of an illness, injury, or condition.

Signs are objective and externally observable; symptoms are a person's reported subjective experiences.[1]

A sign for example may be a higher or lower temperature than normal, raised or lowered blood pressure or an abnormality showing on a medical scan. A symptom is something out of the ordinary that is experienced by an individual such as feeling feverish, a headache or other pains in the body,[2][3] which occur as the body's immune system fights off an infection.[4][5][6]

  1. ^ Sadock BJ, Sadock VA (2008). Kaplan & Sadock's Concise Textbook of Clinical Psychiatry. Lippincott Williams & Wilkins. ISBN 978-0-7817-8746-8. Archived from the original on 6 January 2023. Retrieved 6 January 2023.
  2. ^ "Beyond Intuition: Quantifying and Understanding the Signs and Symptoms of Fever". clinicaltrials.gov. 5 October 2017. Archived from the original on 13 February 2022. Retrieved 9 January 2021.
  3. ^ "Symptoms and self-help guides by body part". NHS inform. Archived from the original on 13 February 2022. Retrieved 9 January 2021.
  4. ^ "How Infection Works, How Pathogens Make Us Sick — The National Academies". needtoknow.nas.edu. Retrieved 29 November 2024.
  5. ^ "Infectious Diseases". Cleveland Clinic. 6 June 2022. Retrieved 29 November 2024.
  6. ^ "Immune System". Cleveland Clinic. 20 October 2023. Retrieved 29 November 2024.
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