question: dear doctor,I had small bulging on my back and started paining and after some time fuss formed on the tip,I removed the fuss by using surgical blade and the place was healing .after 15 to 20 days again the same pain and fuss forming and I removed the fuss and it was healing.the same thing was repeatiing every 15-20 days. when I approach the doctor he says the surgery is required to remove it totally from where it started(deep in the hip).he says it is some thing like some sinus kindly suggest.what to do.