1.What is chronic osteomyelitis? When acute osteomyelitis is not treated properly, it mostly develops into a long-lasting sinus tract and chronic osteomyelitis. In recent years, along with the increase of disaster accidents and traffic accidents, the number of patients with infection secondary to open fractures and surgery is rapidly increasing. The causative organisms are mostly Staphylococcus aureus, while those caused by trauma are mostly gram-negative bacteria such as Escherichia coli and Proteus mirabilis. Chronic osteomyelitis interrupts bone nutrition, resulting in bone necrosis and easy formation of dead bone, which cannot be cured with Chinese medicine and antibiotics alone, and most should be treated surgically. 2. What are the clinical manifestations of chronic osteomyelitis? The clinical manifestations are mostly accompanied by secondary fistulae and repeated drainage of pus. If the fistula is occluded, there will be localized fever, swelling and pain, enlarged lymph nodes, generalized fever, increased white blood cells and accelerated blood sedimentation. If the fistula is not closed for years, there is a high risk that the fistula area will become cancerous and the limb will have to be amputated. The most common clinical features of chronic osteomyelitis are its high incidence, long duration, recurrent acute attacks, not easy to cure, and easy to cause disability. 3. How is chronic osteomyelitis treated? Chronic osteomyelitis is treated differently depending on the condition, and often requires comprehensive treatment, first of all to identify the type of bacteria on the trauma, use sensitive antibiotics, complete surgical removal of the lesion, the use of good blood flow of various types of skin flaps or myocutaneous flaps immediately cover the trauma, on the basis of sufficient certainty to cure the inflammation, a phase of bone grafting, repair of bone defects; a phase of osteotomy orthopedic; a phase of arthroplasty; at the same time, internal and external fixation, so that the bone can be repaired. The bone can be repaired.