Alien hand syndrome (AHS) is when a single limb, usually a hand but sometimes a leg, moves involuntarily. It can signify a serious underlying issue, such as stroke or neurodegenerative disease. Share ...

Discover how the invisible hand in economics guides free markets, using self-interest to achieve societal benefits. Learn why ...

Crampy hands can make it hard to make a fist or bring your fingers together. This usually isn’t dangerous, but other symptoms may indicate an underlying condition that requires treatment. Hand cramps ...

Hand pain can result from injury, arthritis, and other health conditions, including autoimmune disease. The human hands are complex and delicate structures that contain 27 bones. The muscles and ...

Every year, millions of people break bones in their hands. Because we do so much with our hands, even a small loss of function can cause lifelong problems. A broken hand often requires a visit to a ...