what would cause a painful swollen arm and hand
Median nerve injury The median nerve, which runs through the arm and hand, can cause swelling pain and numbness if injured. Ulnar nerve injury Damage to the ulnar nerve causes swelling, pain and numbness in the forearm, hand, and ring and little fingers. Burn (heat or fire) Burns caused by heat are called thermal burns and can cause pain swelling, skin changes, blisters and more.