The hip is the classic ball and socket joint. Typical pains are felt at the front, deep inside the joint and are often to do with the cartilage surface including arthritic changes or the fibrous tissues around the joint like the labrum and bony impingement issues. These are felt as deep pinching type pains. Pains nearer the surface are commonly to do with the numerous tendons.
The side of the hip can be very sore to lay on and are to do with tendon problems as well as bursa issues around the hip bone itself.
At the back are the big gluteal muscles and tendons which are stubborn sporting injuries as well as deeper nerve and muscle type problems sometimes related to the back and pelvis as well as the deeper muscles and the nerves that pass through this area.