Possibilities:
1 – Pain from the hip bursa. The bursa is a fluid filled sack on the outside of hip. Its purpose is to provide friction free movement of the TFL tendon over the bone beneath. It can become inflamed due to muscle tension in the area and other simple causes. If this is the problem, it will be tender to touch/poke the outside of the hip. It will also be painful to sleep on but it should be checked as inflammation in the bursa can be due to other hip joint pathology.
2 – Hip joint pain due to arthritis. This pain will be accompanied by restricted range of movement of the hip joint, a tendency to lean forward when walking and sometimes a limp. It is also difficult to cross the painful leg over the other leg.
3 – Hip joint irritation due to a problem with the joint labrum, ligaments, or the bone. This is often the case after injury.
4 – Pain referral from the spine. This can also cause pins and needles or numbness in the region but not always.
5 – A more sinister cause such as cancer – but this is much rarer.
As you can see there are several possibilities most of which are easily treatable with non-invasive treatments such as Chiropractic and massage, and with the right testing it is easy to determine the cause, so if you have pain of this nature, be sure to check it out with your local Chiropractor.
Please note that this is a guide to explain the most common causes of pain in this region and if in doubt you should always have your pain assessed.