Hidden pain in the right pelvic bone may be caused by muscle strain, chronic strain, osteoporosis, necrosis of the femoral head and so on. 1. Muscle strain: it may be due to the patient to do the twisting action involving the lumbar region, triggering the right side of the pelvis at the external abdominal oblique muscle is pulled, resulting in muscle strain, and then appear the symptoms of the right side of the pelvic bone hidden pain. 2. Chronic strain: it may be due to squatting, sitting or standing for a long time, which causes chronic strain to the inner muscles of the right pelvic bone, generating inflammatory factors and affecting lactic acid metabolism, resulting in the symptom of vague pain in the inner side of the right pelvic bone. 3. Osteoporosis: Hidden pain in the right side of the pelvic bone may be caused by osteoporosis. In the attack of osteoporosis, it may cause a series of bony pain around the pelvis, and at the beginning of the attack, it is mainly a vague pain. 4. Necrosis of the femoral head: it may be due to ischemic necrosis of the femoral head at the hip joint, and the patient will also have vague pain in the right inner side of the pelvis. The right side of the pelvic bone may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.