I had my left TKR 1 1/2 yrs ago and all is well . I had my right aTKR 6 months ago. All was great until about a week ago. My knee was sore and when I rubbed it I noticed that ther was now a definitive dip in my scar line. There is moderate discomfort when I apply pressure to the indentation. I was released by my surgeon but this is concerning me ??? Any responses?