A hard bump on the ribs that feels like a bone may be caused by vitamin D deficiency, osteochondritis dissecans, misalignment of obvious fracture deformity after healing shape, and so on. 1. Vitamin D deficiency: Vitamin D deficiency can lead to systemic phosphorus and calcium metabolism disorders, resulting in bone deformities, the patient may appear on the rib cage protruding a hard bone symptoms. 2. Costal chondritis: localized swelling in the costal cartilage region, a painful localized lump may be palpable, so it may feel like a hard bump on the ribs. 3. Misalignment of the obvious fracture deformity after healing shape, etc., generally traumatic rib fractures, improper treatment will lead to deformity of the ribs. A hard bump on the ribs may also be related to the tumor, it is recommended to go to the hospital in time.