What Causes Pain Around The Incision Site On Buttocks?

pls i am above 50. i was doing daily walk/jog for 30 mins daily. i was doing this and enjoying it 4 about 2 months. suddenly i realize my right hip was paining me right inside my leg. i find it difficult to stand long. you even find me limping after a period of long sitting, esp after driving. I met an orthopedic doctor. my backbone and pelvic bones were x rayed. i was told it was normal. what i am experiencing has to do with my age. i was advised to stop jogging, and embrace cycling and walking as alternative exercises. on my own part, i totally disagree with the DR. telling him that i had an injection on my right bottocks about 5 years ago. this injection site is still paining me. it appears to me that the pains i was experiencing was coming frm that injection site. moreso if i press hard the site the pain becomes more obvious The DR still refused to reason with me. i was given drugs which i consumed over a 4 week period. immediately i finished the drugs the pain came back. i went back to the DR, another set of drugs was given to me for a period of another 2 weeks Now i had finished that drugs and i am really reluctant going back to that DR. in the mean time i am treating the site with ice morning and night kindly advise