Swelling in the body can happen for many reasons. Summer heat can cause your arms or legs to swell if you’ve been sitting or standing for a while. Body parts can also swell from overuse or an injury. But sometimes, swelling is a sign of an underlying medical condition.
More than half your body is made of water. Much of it flows around in your bloodstream. Water also makes up a lesser-known fluid called lymph. Lymph travels through the lymphatic system, which is made up of the tissues and organs that produce, store, and carry immune cells.
