Swollen hard calves after sports may be caused by strenuous exercise or muscle strain, which can be relieved by stretching the muscles, massage, hot compresses, and external use of active oil. Calf stiffness after sports may be due to strenuous exercise, muscle damage is frequent, the calf muscle groups are subject to a certain amount of traction, in the exercise after the muscles can not be relaxed, in a tense state, so the calf is swollen, touch the stiffness. In addition, due to strenuous exercise, the calf blood circulation supply is insufficient, lactic acid accumulation, local congestion, may also lead to this symptom. Swelling and stiffness of the calves after exercise, you can promote blood circulation in the calves through local hot compresses to accelerate the decomposition of lactic acid; you can also use massage, stretching the muscles, relax the calf muscle groups; if the swelling symptoms are obvious or accompanied by pain and other symptoms, you can use topical active oil, safflower oil, etc., to promote blood circulation. Active oil, safflower oil may have skin allergies and other adverse reactions. If the symptoms of calf swelling after exercise can not be relieved, it is recommended to go to the regular hospital in a timely manner, if necessary, active treatment.