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The treatment of a single hand swelling depends on the cause. Hence this has to be found out first. The various causes are carpel tunnel syndrome, inflammation of the tendon of the hand due to repetitive work, gout, lymphangitis, deep vein thrombosis, osteoarthritis and rheumatoid arthritis. You need to consult a doctor and rule these out by blood tests, X-rays, nerve conduction studies, rheumatoid factor, ESR, etc. This could also be due to fluid retention. Fluid retention can be caused by adrenal malfunction, deficiencies of potassium, vitamin B complex, or vitamins B1, B3, or B6, food allergy, hypothyroidism, anemia, constipation, and lack of exercise.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
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