There is little you can do to self-treat a ganglion hand cyst at home. Avoiding repetitive movements may ease the discomfort and over-the-counter painkillers should be enough to help relieve any pain associated with your hand ganglion.
Some people with ganglion hand cysts swear by warm compresses to help increase blood circulation and promote fluid drainage. However the use of warm compresses will not prevent ganglion cyst growth.
We strongly advise against the old home remedy of cyst treatment which involves hitting the cyst with a heavy book as this may cause damage to the surrounding bones and tissues. Never try to drain a cyst yourself.  The fluid in the cyst is very thick, sticky and difficult to remove. There is also a high risk of infection if you try to aspirate the cyst at home.