The symptoms of pain in the calf after walking for a long time are mainly due to excessive exercise, which exceeds the compensatory capacity of the calf, resulting in injury and strain of the calf muscle, leading to excessive accumulation of lactic acid in the muscle and producing pain symptoms. In this case, the first thing to do is to take a brake and rest, preferably in bed, elevate the lower limbs, which is conducive to the blood circulation of the lower limbs, so as to alleviate the local pain symptoms. Continued activity will often cause further aggravation of the injury and strain, which is not conducive to recovery. Secondly, you can take supportive symptomatic treatment, you can take some oral fenbendazole for anti-inflammatory and analgesic, pain relief. You can also take some medicines to activate blood circulation and eliminate blood stasis to promote local blood circulation, which is conducive to the repair of the injury. In addition, if there are conditions, you can do a hot compress, physiotherapy, spectrum irradiation and other physical therapy. After 3-5 days of observation, if the symptoms are reduced, pay attention to the amount of daily activities can be, if the symptoms do not reduce the need to consult a doctor in time.