i have osteomyelitis and this is my 3rd bout i am going into hospital in 3 weeks for another operation on the front of my femur the other 2 infections were on the side of my femur the consultant said i will be in for at least 2/3 weeks as hes doing a debridement and removing the abscess why is it coming back as ive never had an open wound or anything like that what does a debridement mean

Summarized question: What causes osteomyelitis?