The pain on the left side of the pubic bone may be related to the following causes: 1, there may be trauma here, where it is more common to have muscle strains or fractures of the pubic commissure, often due to excessive left-sided hip activities or direct impact here during strenuous exercise, resulting in the above-mentioned injury. 2, it may be caused by a hernia, which is located 1 cm above the left pubic symphysis, the inguinal ring. If there is pain in this area outward and upward, it suggests that there may be an inguinal hernia. The pain in this area may also be caused by vascular lesions on the left side, such as extensive aortic aneurysms or deep vein thrombosis, which can cause pain here.