The most common diseases that can cause fever in the bones are local infections, especially in the soft tissues around the bones. In the later stages of soft tissue infections, the local exudate will be absorbed, and once fluid or inflammatory substances are absorbed in the body, local heat production will occur, resulting in local fever. Rheumatic or rheumatoid arthritis is the most common manifestation of rheumatic or rheumatoid arthritis, which is a feeling of heat in the joints and the surrounding structures. In addition to this symptom, pain, swelling and even limited movement of the joints and deformities may occur. Blood tests and local radiological examinations should be performed as soon as possible to rule out and diagnose the disease.