High blood pressure that has no known cause is called primary, or essential, hypertension. This is the most common type of high blood pressure. It develops slowly, and often people with primary ...

Osteoarthritis develops from joint tissue wearing down over time, while rheumatoid arthritis involves the immune system. Some types of arthritis can be hereditary, including ankylosing spondylitis.

Red blood cell disorders are conditions that affect the number or function of red blood cells (RBCs). RBCs are one of the main components of blood. They are among the most abundant cell types. The ...

Lindsay Curtis is a health & medical writer in South Florida. She worked as a communications professional for health nonprofits and the University of Toronto’s Faculty of Medicine and Faculty of ...

Neurological diseases affect the nervous system, including the brain, spinal cord, and peripheral nerves that carry signals throughout your body. These conditions can disrupt movement, thinking, mood, ...