Both sides of the back pain may be due to lumbar muscle strain, fasciitis, ankylosing spondylitis, etc., but usually there is no direct correlation with anger, mostly due to anger after emotional excitement, muscle tension leading to the aggravation of the original symptoms. 1. Lumbar muscle strain: the most common in long-term sitting or overworked groups, resulting in lumbar muscle strain, followed by bilateral lumbar pain, after anger, may be due to emotional excitement, lumbar and back muscle tension and feel the pain aggravated. 2. Fasciitis: due to previous trauma to the lower back or cold in the lower back, resulting in aseptic inflammation of the deep fascia of the lumbar region, which in turn causes pain. This kind of pain involves a wide range, may be bilateral, and may even involve the back of the shoulders. 3. Ankylosing spondylitis: it is a chronic progressive inflammatory disease of the spine, which belongs to polygenic hereditary disease, and the onset of the disease may be related to some bacterial infections. Generally manifested as lower back pain, can feel stiffness in the waist in the morning or sedentary up and down, can also be manifested as unilateral, bilateral or alternating buttocks, groin to the lower extremities of the radiation of the soreness. After having gas both sides of the back pain may also be caused by other factors, such as acute lumbar sprain, but this symptom alone is not enough to diagnose the disease. If the symptoms are severe and do not ease, you should consult a doctor to clarify the cause of the disease and give targeted treatment.