The causes of pubic bone pain after 50 years old may be chronic strain injury, pubic bone trauma and tumor metastasis, osteoporosis and so on. 1. Chronic strain injury: in life or work, due to long-term chronic strain injury, resulting in local ligament or muscle pulling, pubic bone pain. At this time, you should reduce activities and treat the symptoms. 2. Pubic bone trauma: commonly seen in athletes, such as soccer, rugby, volleyball, gymnastics, figure skating and ballet, etc., who need to run, change direction quickly and jump, the external force during the movement increases the pressure on the pubic bone, which can easily cause injury pain. 3. Tumor metastasis: if there are tumors in other parts of the body, when the tumors metastasize to the pubic bone, pubic bone pain will easily occur. 4. Osteoporosis: Osteoporosis is a systemic disease characterized by the decrease of bone mass and the destruction of microstructure of bone tissues, which is mainly manifested by bone pain. In addition to pubic bone pain, it may also be accompanied by pain in hip, spine and wrist, etc., and these parts are prone to fracture. After the age of 50, pubic bone pain may also be caused by other reasons, when the pubic bone pain, the first time to the hospital, according to the relevant examination to clarify the cause of early treatment.