Plantar pain after running may be caused by physiological factors such as strenuous exercise and poorly fitted shoes, as well as diseases such as plantar fasciitis and metatarsal tendonitis. 1. Physiological factors: strenuous exercise, poor footwear and inadequate preparation before exercise may lead to local overload tension and plantar pain after running. This kind of situation is a normal phenomenon, no need to worry too much. 2. Plantar fasciitis: plantar fasciitis may be caused by inflammation, micro-injury, obesity and other factors. Patients may experience pain in the heel area, and the pain is obvious after exercise, which is manifested as pain in the sole of the foot after running. 3. Metatarsal tendonitis: Metatarsal tendonitis may be caused by chronic strain, trauma, obesity, bad habits and other factors. Patients with metatarsal tendonitis may have pain at the root of the foot, accompanied by slight swelling, pressure pain and other symptoms, manifested as pain in the sole of the foot after running. There are many reasons for the pain in the sole of the foot after running, if it fails to get better after resting, it is recommended to go to the hospital in time for relevant examination, to clarify the cause of the disease, and to carry out targeted treatment.