I've had I think the same thing you are describing. If it is the same thing, its not something which would require rehab or surgery, just supplements.
The issue I had was that I was essentially overtraining. My joints were grinding together, and were grinding through the cartilage enough to actually contact each other, it caused a very minor clicking sound on occassion, but most importantly caused a dull throb that occured minutely during, and sustained after a workout for a fairly long time.
I remedied the situation by adding a couple joint support supplements to my retinue. Glucosamine/Chondrin and shark cartillage. They almost immediately helped relieve the ache after only about a week of taking them 2 servings a day. Additionally, the goober at Vitamin World tried to sell me a Glucosamine/Chondrin supplement with a natural pain reliever built in to immediately relieve the pain until the joint repair took effect.
It is also possible that this is a muscular/tendon/ligament problem. If you've got the insurance, seeing a doctor is always a good idea. If you don't, roll the dice and hope the supplements help.
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