Lymphedema is a chronic build-up of lymph fluid that usually starts in an arm or leg. Think of a sponge that never gets wrung out—soft at first, but gradually stiff and heavy.

Painless swelling is the hallmark. One limb looks puffy by day, goes down overnight, then stays swollen as time passes.

Heavy, tight feeling follows. Your arm or leg feels like it’s wrapped in wet denim, especially after standing or long flights.

Sock-ring stays deep. Elastic leaves a groove that takes minutes to fade, even with loose socks.

Skin changes appear. The area turns leathery, dry, and may itch or feel tight, as if it’s one size too small.

Repeated infections crop up. Small cuts turn red, hot, and painful more often than on the other limb.

Late alarms include hard, woody tissue, skin that weeps fluid, or large warty bumps—signs the limb is badly backed up.