There are several causes of back pain: 1. Fasciitis of the lumbar back muscles, the fascia of the lumbar back muscles is like a cloth laid on top of the muscles, when there is chronic inflammation there will be a large area of pain in the back, especially in the morning when the back pain is very obvious. 2. Lumbar muscle strain, when there is strain in the muscles of the back there will also be a large area of pain in the muscles of the back. 3. The pain in the lumbar region will occur when the nerve is compressed by a herniated disc, and may be accompanied by hip discomfort or numbness and pain in both lower extremities. 4, it may be rheumatic diseases, rheumatoid or ankylosing spondylitis and pain in the lumbar back. In addition to orthopedics there may also be gynecological inflammation, such as pelvic inflammatory disease, pelvic effusion can also lead to low back pain, which is often accompanied by discomfort in the abdomen and a feeling of swelling in the abdomen. In addition, pain in the lower back can also occur when there are stones in the urinary system, which is often accompanied by pain in the small or middle abdomen.