In most cases, a synovial cyst in the wrist does not require treatment, according to the MSD Manual. Simple monitoring is usually sufficient, along with wearing a splint to rest the wrist. In 40% of cases, the synovial cyst resolves spontaneously within six months, as Dr. Laurent Thomsen explains on his website. However, if the cyst causes significant discomfort due to its size or location, or if there is pain, non-steroidal anti-inflammatory drugs (NSAIDs) may be prescribed, and synovial fluid may be aspirated. However, any aspiration carries a risk of infection. Furthermore, it does not prevent recurrence, and often with a larger cyst than the previous one. Therefore, aspiration is only considered with caution and after carefully weighing the risks and benefits.
The last possible option for treating a synovial cyst of the wrist is surgery to remove the cyst (excision of the synovial cyst) if it is too painful, too large, or bothersome. This procedure is performed under local anesthesia on an outpatient basis. The swelling is then analyzed in a laboratory. The patient wears a dressing for several days to prevent infection. They must also wear a wrist splint for two weeks to allow the joint to rest.
