Leg pain may be caused by arthritis, varicose veins, blood vessel blockage, lumbar disc herniation, and other factors. In fact, leg pain is very common in our daily life, but we should pay attention to it when it occurs and find out the reasons in time. If the pain is caused by disease, timely treatment measures need to be taken. 1. Heterosexual infection sources can cause bone pain in the lumbar and leg regions, and can also cause joint and soft tissue infections. Trauma, strain, cold, and dampness can cause aseptic inflammation of people's soft tissue, which can also cause lumbar and leg pain. Muscle spasms, which people often encounter, are the causes of leg pain. In fact, the most common cause of leg pain is articular inflammation, such as rheumatic and rheumatoid arthritis. 2. Leg pain caused by varicose veins is common in people with incorrect posture, such as those who stand for long periods of time. Hormonal changes in pregnant women around the 20th week of pregnancy can also cause varicose veins and leg pain. If a person's venous wall structure is defective, damaging the valves, it can also cause leg pain. 3. Arthritis is also a major cause of leg pain, which includes rheumatic arthritis and rheumatoid arthritis. The former is characterized by variable pain in the joints, while the latter is manifested by stiffness and inflexibility in leg movement.