hello doctor, my wife has a pilonidal sinus, just a month before doctor just made a small surgery and remove the puss and let it open and ask to dress daily after a month the wound was healed , after that the doctor asked for a surgery to remove the hair and other debairs watever it is , he told that the opperation sucess rate is 93% only , it may come to some people again, the doctors answer made me very upset. is not quarable? pls answer to my question as soon . thank u