Foot cramps after exercise may be caused by physiological reasons such as excessive exercise and cold stimulation, as well as pathological reasons such as osteoporosis and vascular diseases of the lower limbs. 1. Physiological reasons: too much exercise or long-term non-exercise suddenly high-intensity exercise may cause local muscle overload or slight strain, resulting in tonic contraction of the muscles, manifested as muscle spasm, that is, the performance of cramps; in addition, the exercise environment is too cold or no timely warming measures after exercise will also lead to the contraction of the blood vessels in the foot, which may also appear in the above symptoms. 2. Pathological reasons: Calcium ion is an important ion to maintain normal muscle contraction, diastole, and excitability, etc. When calcium ion metabolism is abnormal due to various reasons, foot cramps may occur, such as osteoporosis, calcium and phosphorus metabolism disorders, etc.; the existence of vascular diseases of the lower limbs may lead to aggravation of the condition after exercise, and the above symptoms may also occur, such as occlusive vasculitis, varicose veins, etc. If the symptoms occur after lifestyle modification, the symptoms will be more severe. If the symptoms are not relieved after lifestyle modification, one should consult a doctor in time to clarify the cause of the disease and treat it under the doctor’s guidance.