Standing on the soles of the feet pain may be strain, plantar fasciitis, flat feet and other causes, should be timely consultation to find out the cause of the disease. 1. Strain injury: If the tendons, ligaments and fascia of the foot suffer strain injury, when standing for a long time, the tendons, fascia and ligaments in the foot area will be overly strained, which will easily cause spasm and edema, and then it will lead to plantar pain. 2. Plantar fasciitis: it is related to the patient’s age, physiological factors, obesity, and specific sports. It can show the symptom of plantar pain after standing for a long time, and the pain symptom is more obvious after catching cold and exertion. 3. Flat feet: caused by congenital or acquired factors, the muscles, ligaments and tendons of the foot and ankle are dysfunctional, and the bone structure can not maintain the normal physiological structure of the foot arch, which leads to the collapse of the foot arch. The patient experiences pain in the ball of the foot after standing for a long time. There may be other reasons for the pain in the sole of the foot when standing, so you should consult a doctor in time to clarify the specific cause and treat accordingly if necessary.