Groin pain and later leg pain is considered to be related to lumbar intervertebral disc herniation, epididymitis, sacroiliac arthritis, lumbar spinal stenosis and so on. 1. Lumbar intervertebral disc herniation: it is related to degeneration of intervertebral discs, chronic strain injury and abnormal development of lumbar vertebrae. Typical symptoms include lumbar pain, radiating pain in lower limbs, reduced mobility of lumbar vertebrae and decreased muscle strength. 2. Epididymitis: mostly seen in sexually active men, the disease is mainly caused by infection, bad sex, urinary tract infection and other triggering factors. The main manifestations are pain or swelling in the epididymis, and the pain can radiate to the groin, lower abdomen, waist and inner thighs. 3. Sacroiliac arthritis: related to heredity, infection, autoimmune disease, etc. The main manifestations are pain in the lower back or buttocks, impaired mobility, and stiffness of the joints after waking up in the morning. 4. Lumbar spinal stenosis: the disease can also cause groin pain and later leg pain in some patients, also easily accompanied by intermittent claudication, cauda equina syndrome, foot drop and so on. Lumbar spinal stenosis is mainly related to congenital spinal canal underdevelopment, trauma, inflammation and infection, osteophytes and so on. It is recommended that those who suffer from groin pain and then leg pain should consult a doctor in time for examination, and follow the doctor’s instructions after clarifying the cause of the disease. Pay attention to daily rest, avoid strenuous exercise, overwork and so on.