There are four main types of disease: infectious diseases, deficiency diseases, hereditary diseases (including both genetic and non-genetic hereditary diseases), and physiological …

5 days ago · disease, any harmful deviation from the healthy structural or functional state of an organism, generally associated with certain signs and symptoms and differing in nature from …

Jun 1, 2025 · At first glance, the answer seems deceptively simple: disease is the presence of illness, of something going wrong within the body. But the deeper we probe into this …

Jun 5, 2025 · Osteoporosis is a bone disease that develops when the bones get weaker and less dense. When a child or teen develops osteoporosis, the condition is known as juvenile …

Explore comprehensive guides on hundreds of common and rare diseases and conditions from the experts at Mayo Clinic.

See a healthcare provider if you have symptoms of an infectious disease, especially if they don’t get better within a week or two. If you have an ongoing infection, frequent follow-ups with your …

The meaning of DISEASE is a condition of the living animal or plant body or of one of its parts that impairs normal functioning and is typically manifested by distinguishing signs and symptoms : …

5 days ago · It is believed to accelerate aging and contribute to more than half of all deaths worldwide by driving various age-related diseases such as arthritis, autoimmune conditions, …

A to Z list of common illnesses and conditions including their symptoms, causes and treatments.

A disease or medical condition is an unhealthy state where something bad happens to the body or mind. [1] Diseases can cause pain, parts of the body to stop working the right way, or death.