The main causes of sacral edge pain are related to degenerative lesions, inflammation, trauma or tumor growth. 1. Degenerative lesions: If you often have poor posture or bear weight and exertion, as you get older, degenerative lesions such as osteophytes on the edge of the sacrum may occur, which may cause local pain symptoms. 2. Inflammation: If there is local inflammation in the area of sacral edge, such as fasciitis and ankylosing spondylitis, the stimulation of inflammation will easily and directly trigger the symptoms of pain. 3. Trauma: If the edge of the sacrum is impacted by external force, such as smashed by foreign objects or falling from a high place, it will easily cause pain and even swelling. 4. Tumor growth: in the area of sacral edge, if there is local tumor growth, such as bone tumor and metastatic tumor, etc., it is easy to stimulate the surrounding pain receptors, thus triggering the pain manifestation. Sacral edge pain may also be caused by other reasons, if the pain is more serious, you can go to orthopedic consultation, targeted treatment under the guidance of a professional physician, and pay attention to rest before the pain is not relieved, do not do too much exercise.