Chronic osteomyelitis, due to the use of antibiotics, is less common as many acute inflammatory processes are treated correctly as they develop. It typically manifests as follows: 1. history of recurrent attacks; 2. due to chronic purulent osteomyelitis, which does not heal over time, sinus tracts can form, for example, in the lower extremities and lower legs that do not heal over time. At the same time, due to the stimulation of pus, the tissues around the sinus tract can deteriorate and scarify; 3. There is unbearable pain during the attack, and during the attack, the fistula secretion will increase, the wound surface will erode and expand, and it will not close for a long time, the granulation adheres to the white secretion, the red and white interval becomes cauliflower-shaped, the granulation can appear volcanic, easy to bleed, and the bleeding is not easy to stop; 4. There are changes in the bone quality, and on top of the x-ray Rapid osteoporosis can be seen.