Swelling of the fingers after exercise occurs most often in people who do not exercise regularly. After a patient has not exercised for a long time and the blood circulation and peripheral circulation have slowed down, a sudden high dose of exercise causes capillary dilation, increased perfusion in the peripheral circulation and increased capillary permeability, resulting in excessive fluid accumulation in the interstitial spaces of the tissues and swelling of the tissues, which manifests as swollen fingers.