There are many other things that have been tried and tested to cure swelling and inflammation of body parts including fingers. Take over-the-counter high potency B-complex supplement. This will reduce water retention. Secondly, add alfalfa, parsley and dandelion roots to your diet. You may take these substances in the form of capsules, tea or tincture. Thirdly, take non-prescription supplements containing bromelain enzyme. It will boost digestion and alleviate allergic reactions.