The swelling of the thumb can be reduced by the following methods: 1. Try to rest the joint. You should also avoid catching cold in the thumb and overexertion, which can further reduce the swelling of the thumb. 2. Take oral medication. If the swelling is caused by osteoarthritis, you can take oral medication to nourish the cartilage, such as glucosamine hydrochloride and glucosamine sulfate; if the swelling is caused by rheumatoid, you should take anti-rheumatoid treatment, such as wind and pain relief capsules; if the swelling is caused by gout, you need to take uric acid reduction treatment, such as oral If the swelling is caused by gout, it should be treated with uric acid lowering therapy, such as oral allopurinol tablets or sodium bicarbonate tablets for treatment. 3. Microwave physiotherapy or far-infrared physiotherapy can be used to relieve the swelling of the thumb.