Hip Joint

What might cause my hip joint pain and how to improve it?

I'm 34 and for the last year my hip joints have been sore after exercising. It's been getting worse in the last month. I have weighed about 1 stone more than I used to during this last year but have been keeping up my regular level of exercise, which includes aerobics and disco-dancing on weekends, which involves a lot of jumping around.

Are my hips worn out?
What can I do to improve their condition?
Any supplements I can take?
Do I need to stop dancing so much/energetically?

There is a certain type of arthritis that starts in the hip joints (I don't remember the name) that could be a possibility,A rheumatoid specialist could diagnois that, they would have various arthritis medications, they could prescribe. It is not really normal for your hip joints to hurt at such a young age,that you would think arthritis,or gout or other reasons than just wear and tear.
In addition to that, increasing blood flow, fluid, and nutrtion flow to the joints would help (more water, less alcohol/coffee, cutting back on fatty foods and alcohol for gout, perhaps adding omega-3 oils, to help inflammation,glucosamine/chondroitin to help joint linings, calcium, magnesium, Vit-C, Vit-D for bone.
Some people have shallow hip joints, and stretchy tendons, so there can be pain from them slipping out of alignment slightly and wearing on the joints and nerves unnatuarally, there is Sciatica from a pinched stretched nerve, your treatment would depend upon what underlying reason the pain is coming from, that only a doctor, tests, x-rays, etc could find out.