Walking pain in the left leg may be related to the following reasons: 1. It may be caused by trauma to the left lower limb. There are many types of trauma for this symptom, such as muscle and tendon strains of the left lower limb or bone contusion, old fracture, dislocation, these traumatic injuries may cause pain in the left lower limb during walking. 2, it may be due to the inflammation of the joints of the left lower limb, for example, traumatic arthritis in the knee, hip, ankle, osteoarthritis, rheumatoid arthritis and so on. 3, this symptom is likely to be due to intermittent inflammation, rheumatoid arthritis. Rheumatoid arthritis, rheumatoid arthritis, etc. 3, this symptom is likely to be caused by intermittent claudication. Intermittent claudication of the left lower limb is often due to vascular lesions of the left lower limb or the presence of spinal stenosis and lead to 4, this symptom is likely to be due to fatigue fracture of the left lower limb or osteochondritis dissecans, both diseases are often due to the patient’s excessive activities, which led to the lower limb related lesions.