There are many causes of lumbar pain, and the following cases should be promptly taken to the hospital. 1. When lumbar pain occurs after a fall or a fall from a height, along with uncontrollable urination and defecation and weakness of the legs and feet, a lumbar spine fracture should be highly suspected. In this case, you should call 120. 2. When there is numbness, pain and other abnormalities in the legs and feet at the same time as lumbar pain, consider lumbar disc herniation. In this case, an orthopedic surgeon should be called. 3. If there is red urine and vulvar pain at the same time as low back pain, the possibility of kidney stones should be considered. If you have low back pain and stiffness in your back when you stand up after getting up or sitting for a long time, you can’t rule out the possibility of ankylosing spondylitis. This disease often occurs in young men (16 to 25 years old is the most prevalent age group), mostly manifested as pain or stiffness in the lower back in the morning or when standing up after sitting for a long time, but reduced after activity. The rheumatology department can be consulted to rule out this possibility.5. If a woman has low back pain and a feeling of abdominal swelling at the same time, it may be caused by pelvic infection or some gynecological inflammation. In this case, you need to pay attention to the presence of leucorrhea abnormalities. If necessary, you can visit the obstetrics and gynecology department. 6. If low back pain is accompanied by long-term fever, the possibility of lumbar spine tuberculosis cannot be ruled out. Usually, symptoms such as poor appetite, fatigue and weight loss may also occur in lumbar spine tuberculosis. If the above symptoms exist, it is recommended to consult an orthopedic surgeon. 7. If low back pain is accompanied by urinary urgency, painful urination and fever, it may be a urinary tract infection. It is recommended to visit the urology department.8. People with osteoporosis may also have low back pain. Also patients with osteoporosis are likely to have compression fractures due to some small movements (such as bending over, sneezing). If osteoporotic patients have unrelieved low back pain, it is recommended to visit orthopedics. The cause of low back pain in office sitters and manual laborers (especially workers who need to bend over to lift heavy objects) is usually lumbar muscle strain. Low back pain caused by lumbar muscle strain can be prevented and relieved by paying attention to sitting posture, bending posture and lumbar back muscle exercise. If the back pain is not relieved after adjusting the posture, you should also go to an orthopedic surgeon.