FHL Tendon

Hi. I have been to 3 foot doctors about pain in my FHL tendon or PT tendon. I have pain to the posterior of the ankle bone on the inside of my foot. The pain is not sharp or specific, but the whole area on the inside of my ankle hurts when i’m standing for a while or running. I ran through this injury for 4 years and have stopped running 2 years ago. It has gotten better, but has not dissapeared and flares up with certain activities. My most recent doctor said he thought it was the FHL tendon but I do not have pain when pushing my big toe against the floor for resistance. He also suggested a minor surgery to “clean up” the tendon area. Any help, advice, or opinions would be greatly appreciated.