Lumbar pain at the age of 30 may be caused by lumbar disc herniation, iliopsoas osteoarthritis, lumbar fasciitis and other causes. 1. Lumbar disc herniation: lumbar disc herniation is usually caused by overloading and trauma, etc. When the nucleus pulposus of the lumbar disc protrudes to the side of the annulus fibrosus, it will compress the sciatic nerve around the spine and make the innervated area feel abnormal, causing the patient to experience pain, aching, numbness and other symptoms of the lumbar region, and it may also be radiated to the lower limbs of the same side. 2. Sacroiliac arthritis: iliopsoas arthritis is usually caused by the patient’s weight-bearing labor, often high-intensity activities, which may lead to the sacroiliac joints to produce hyperplasia, edema and other reactions, which may cause the patient to appear in the lower lumbar region of the persistent pain, swelling, and pain, and may cause bending activities are limited. 3. Lumbar fasciitis: lumbar fasciitis is usually caused by the patient cold, trauma, excessive exercise, etc., is a kind of lumbar fascia as well as aseptic inflammation of muscle tissue, inflammation will stimulate the local tissue to produce oedema, oozing, causing the patient’s lower back pain and discomfort. 30-year-old back pain may have other reasons, such as urinary stones, lumbar spine tuberculosis, etc., it is recommended to consult a doctor in a timely manner to clarify the cause, and then given by the doctor to standardize the treatment.