A swollen foot after a long day may be nothing more than temporary fluid buildup. But when an arm or leg suddenly becomes larger, painful or unusually warm, the swelling could be a warning sign that needs prompt medical attention.
Swelling occurs when fluid collects in the body’s tissues. This is called edema. It most commonly affects the feet, ankles and legs, although the hands and arms can also swell. The swelling may involve one limb or both, appear suddenly or gradually, and feel soft or firm depending on its cause.
Understanding when the swelling started—and what other symptoms accompany it—can help determine what may be happening.
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