Symptoms of painful weakness in the feet are often considered to be caused by abnormalities in the neuromuscular function of the lower extremities or unfavorable blood circulation in the lower extremities, both of which are mutually causal, interacting and co-existing. The common causes are as follows: first, including injury, strain, inflammation, infection, tumor and other conditions. Second, due to age-related degeneration and other diseases, including lumbar disc protrusion, contusions and strains of the lower extremities, as well as long-term chronic strain, joint inflammation, fasciitis, and soft tissue infections and muscle infections of the lower extremities, can lead to symptoms of foot weakness and pain. Third, other diseases can also occur, such as potassium deficiency and calcium deficiency, often due to endocrine factors. Fourth, neurological diseases, such as cerebral infarction and cerebral ischemia, can also produce the corresponding symptoms.