Pain on the lateral side of the foot is not necessarily caused by diseases, it may be caused by the squeeze of ill-fitting shoes, fractures, sciatica and other diseases, as well as other diseases such as fasciitis. 1. Ill-fitting shoes: If you wear ill-fitting shoes in your daily life, it will cause the shoes to squeeze the lateral side of the foot, which will lead to the symptoms of lateral side pain. 2. Fracture: Fracture is caused by various factors such as trauma, osteomyelitis and other bone diseases, which will cause local pain, swelling, ecchymosis, dysfunction, deformity and other symptoms. Fractures on the lateral side of the foot may cause pain on the lateral side of the foot. 3. Sciatica: Sciatica is caused by the compression of nerve roots and sensory ganglia, and the main symptoms are pain in the buttocks, thighs, and the posterior and lateral parts of the calves. There may be radiating pain on the lateral side of the foot and limp performance, so the patient will have the symptom of lateral side of the foot pain. 4. Other: Fasciitis, bursitis, osteomalacia and other diseases on the lateral side of the foot may also lead to lateral side pain. When the symptoms of lateral foot pain appear, you should consult a doctor in time to clarify the cause of the disease and follow the doctor’s instructions.