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You haven't mentioned your age. Do you have any stiffness in your backbone as well. You could be having symptoms of a connective tissue
disorder arthritis like Rheumatoid arthritis
which typically presents as joint stiffness
and pain in the morning and gets relieved on moving the joints. Joint swelling will not usually be seen in early stages. It is better to consult a Rheumatologist/Orthopaedician to get evaluated completely and get appropriate treatment.