Left foot pain is categorized into physiological and pathological, and pathological causes include skeletal muscle diseases, neurological diseases and infectious diseases. 1. Physiological: If the left foot is hit by external force, it will stimulate the pain sensory nerve to produce pain symptoms, which is generally a normal physiological phenomenon and does not require additional special treatment. 2. Pathological: If you suffer from plantar fasciitis, Achilles tendonitis or heel spurs and other musculoskeletal disorders, you will have foot pain; there are also neurological disorders that can cause foot pain because of compression of the nerves, such as ankle tube syndrome, pyriformis syndrome, and peroneal neuritis and other disorders; there are also infectious diseases such as dengue, but also because of the inflammation and edema to produce this symptom. If the left foot pain does not recover on its own, or is accompanied by other symptoms, it is suspected to be pathologic, and it is recommended to go to the hospital in time.