Muscle pain at the back of the calf after prolonged walking or strenuous exercise is mainly due to excessive accumulation of lactic acid within the muscle and circulatory disorders caused by strenuous exercise, which in turn may lead to muscle pain and inflammation of the fascia. Clinically, the most common is the pain, swelling and sometimes tingling in the gastrocnemius muscle area at the back of the calf, and the pain may be aggravated when standing or walking, and the symptoms can be alleviated when resting in bed. For this situation, the correct treatment should be adequate bed rest, rest can be the affected limb elevated, that is, put a pillow under the foot or a bed quilt, in order to promote venous circulation, venous return smooth. If the pain is more intense, you can apply hot compresses to the local area, you can use hot water bags or hot towels, and infrared therapy can also be used if there are conditions. You can also take oral medication, such as non-steroidal anti-inflammatory and analgesic drugs, dehydration and swelling drugs, and drugs to improve circulation.