Osteoid osteomas are benign bone forming tumours that typically occur in children (particularly adolescents). It is very rare in older adults over the age of 50. Patients with osteoid osteoma typically complain of progressively increasing pain that is worse at night and unrelated to activity. The pain is relieved by aspirin or other nonsteroidal anti-inflammatory medications. Lack of relief by nonsteroidal anti-inflammatory agents should prompt consideration of other diagnoses.