Welcome, From your query i suspect you may be suffering from Hip Osteoarthritis
Increasing age and overweight are the factors for hip osteoarthritis.
Take rest whenever you need and exercise regularly.
Exercise helps in both ways
by reducing the overweight and by strengthening the muscles around the hip joint.
Thus exercise help in preventing wear and tear of hip joint.Physiotherapy
can help in reducing the pain.
Surgery is usually done if you have severe pain and in profound bone deformity
surgery in which hip joint is replaced by metal and metal cap.
Hope this helps.