So, I am 43 yrs old, female and in 2006 had an OWHTO which proved successful. A couple of years back I experienced severe pain in the knee and attending the hospital where it was checked and all seemed fine so I decided that maybe some slight weight gain was causing the issue and I duly lost the weight I had gained.... Recently it is happening again and this time the pain is just continuous.... night and day, applying heat seems to help and it is limiting my ability to exercise..... I am reluctant to visit the hospital/GP this time until I have exhausted the possibility of again, slight weight gain causing the issue, so I intend 1) to change my diet and 2) increase moderate exercise (Swimming) to try and control/reduce the pain .... is there anyone out there who has experienced similar? or who is approaching their 10 year OWHTO anniversary and how are they finding it?