The pain in in the joints of fingers as you describe seem to be due to overexertion, strees to the finger joints.
Please give rest to the part,
If you are doing finger movements, Do not strech them much, do in in a hot water bath, local pain killers may help.You can try antiinflammatary agent like Ibuprofen
400 mg. after food.Serratopeptidase is also indicated.Take calcium & vit. D suppliments.
You should take a orthopedic advice/physiotherapic to have & preserve good working of the hand.