BACKGROUND Non-traumatic fractures caused by convulsions are relatively rare and are often overlooked due to the lack of obvious evidence of injury. Non-traumatic fractures due to convulsions are diverse, but the concomitant of pelvic and femoral fractures has not been reported previously. CASE SUMMARY A 47-year-old woman with a no significant medical history, was taken to the nearest hospital after one episode of generalized tonic-clonic seizure that had occurred during sleep. After the postictal phase, the patient regained consciousness and experienced diffuse pain in the inguinal regions bilaterally with inability to stand or walk. The entire attack was witnessed by the family members who confirmed that there was not external trauma. Blood investigations revealed high creatinine and uric acid levels, along with a low calcium level. Conventional radiograph of the pelvis was performed to detect the cause of pain. The patient was noted to have a pelvic fracture and unilateral fracture of the neck of the femur. She was then transferred to our hospital for further management. The patient was diagnosed as having Tile type B3 pelvic fractures combined with a Garden type III femoral neck fracture on three-dimensional computed tomography (3D-CT). In view of her blood results, nephrology consultation was sought. The patient was identified as having a stage 5 chronic kidney disease (CKD), hypocalcemia, and hyperphosphatemia. However, neurological examination showed no abnormalities. No surgical intervention was adopted for her pelvic fractures. In addition to complete bed rest, closed reduction and percutaneous cannulated screw fixation was performed for the treatment of the right femoral neck fracture. An arteriovenous fistula was created for maintenance hemodialysis on the tenth postoperative day. At follow-up, twelve months follow-up after the operation, the patient had a normally gait and was satisfied with the outcome. CONCLUSION Patients who present with convulsive seizures especially patients with ion metabolism disorder should be examined thoroughly to ensure that no injury is missed.