Hi
@RoboPop. I just wanted to share what I was told in 2016 and again in 2018. Feel free to ignore, as I am in no way giving medical advice or claiming to know everything. I've just lived this twice!
Back in the summer of 2016, I was in the middle of a 10 month rehab from my MACI surgery in Dec. 2015. I was doing 2-3 hrs of aggressive PT, 3X a week
(that's a nasty post for another day!!). I developed severe pain almost exactly where you describe. Without a picture, it's tough to know for sure, but I'll tell you what I was told....
1) My surgeon and PT said it's probably textbook tendonitis due to overuse of the patellar tendon---IF it's mostly below the knee, on the front of the leg. It's a common problem after that level of PT and large amounts of exercise. It's considered an overuse problem--almost no one can relate it to any sort of injury. It tends to come out of nowhere and can be VERY hard to resolve. It happened again in the summer of 2018 after a microfracture surgery on my other leg, as I was trying to get back in shape as fast as possible before my right TKR that winter. I had extensive ultrasound therapy both times, lots o direct ice massage, and since the advice of complete rest doesn't have the best track record for getting rid of it, our plan was to back off of everything by 50% (do half the sets and half the weight). Granted, that aggressive PT is what got me in the position in the first place, but I didn't know any better back then. I am happy to say it worked both times. It's not wise to ignore this pain. Patellar rupture is a real possibility and not uncommon. I was told tendonitis is usually that overuse injury you can never neglect or expect to just resolve on its own....and I feel for you. It was sheer
misery.
2) Another idea---Because I can't see exactly the area you're referencing. There's a chance it's inflammation of the peroneal nerve that runs down the front/outer shin. I had so much scar tissue from 7 nasty surgeries on my right leg, so it was almost a guarantee that my pain in THAT area was peroneal nerve inflammation. I had it injected (cortisone and lidocaine injections) 2-3X before getting relief. I've had to reduce much weight I lift on the leg ever since. The diagnosis later by my new TKR surgeon (after he performed the TKR in 2019) was there was loads of scar tissue--
actual adhesions--wrapped around the head of my fibula bone, and that's where that branch of the nerve runs down your leg. I've since had issues with this again, but mostly in the upper ankle area instead. It's all that same branch of the peroneal nerve though, and all related to the number of adhesions and reduced mobility in that right leg.
My 2 TKR surgeons have been the best at explaining what all of that pain was about those 3 years. First, they said I had BOTH problems independent of each other. The areas affected just happened to be side by side anatomically. Each said the tendons were overused by too much exercise and too aggressive of PT, plus the nerves were unhappy because there had been so many procedures (7 in 8-9 years). Now I'm dealing with the adhesions that don't let my lower right leg move well, and I occasionally see a chiropractor who specializes in lower extremity problems. He does a great job of helping all the bones in that right lower leg move with each other, limiting friction and fascia pain. I've always had a "sticky fascia" problem, likely having to do with my psoriatic arthritis.
Best of luck to you, and I'm sorry this is still on-going and stalling out your recovery. I think you'll get there with some modifications though.