Nikkelar,
Since there are so many things which can cause discomfort in the joints, without a full evaluation it usually is not possible to tell what the exact cause is.
You do not say if you have had trauma to the area, if you have any inflammatory conditions, a family history of DJD, or other information.
In general, when patients complain of pain occuring after activity in the joints, you thing of osteoarthritis (DJD - degenerative joint disease). Patients with inflammatory disorders (such as rheumatoid arthritis) usually feel worse after rest and better with activity. But, without an evaluation, it is not really possible to say what is going on exactly.
If it does not respond to the usual home remedies, you may want to see your physician about it.
Good luck.