A to Z A to Z list of common illnesses and conditions including their symptoms, causes and treatments The terms illness and sickness are both generally used as synonyms for disease; however, the term illness is occasionally used to refer specifically to the patient's personal, subjective experience of their disease. [5][6][7][8] In this model, it is possible for a person to have a disease without being ill (to have an objectively definable, but. Clarify the definition of illness, differentiating it from disease and sickness. Explore the complex causes and the subjective nature of poor health. ILLNESS definition: poor health; sickness. See examples of illness used in a sentence. Explore comprehensive guides on hundreds of common and rare diseases and conditions from the experts at Mayo Clinic. WebMD Symptom Checker is designed with a body map to help you understand what your medical symptoms could mean, and provide you with the trusted information you need to help make informed decisions in your life for better health. Did you come down with a nasty bug or a mystery is-this-allergies-or-something-else illness recently? If so, you're likely one of many who has been targeted by a round of spring viruses. According. What is Illness: Symptoms, Causes, Diagnosis, and Treatment Definition and Overview Illness is a broad term that defines the poor state of mind, body, and, to a certain extent, spirit. It is the general feeling of being sick or unwell (outside the person’s belief of good health). Viral infections are any illness you get from a virus (a small germ that uses your cells to reproduce). Examples include the flu, colds, COVID-19 and HPV. The meaning of ILLNESS is sickness. How to use illness in a sentence.