I Am 62 Year Old Female And I Have Pain

I am 62 year old female and I have pain in my calves, ankles and arches. If I massage my calves - they are very painful. The inside portion of my ankles are painful when touched. I seem to be healthy so I don't understand why my legs and feet bother me so much. I went to PT and it helped a bit but they pain returns and no one seem to know the root cause of why the muscles/tendons hurt. Any ideas?