Treatment options for synovial cysts in the knee include applying ice packs, oral pain medication, aspirating fluid from the cyst with a needle and injecting the cyst with a corticosteroid, according to MD Guidelines. Some cysts rupture on their own with no treatment.
Synovial cysts are small, benign cysts filled with fluid, states Spine-health. Doctors do not know what causes the cyst, though trauma to the area is a suspected contributing factor, explains MD Guidelines. Synovial cysts initially present as small masses under the skin that grow firmer with time. The cysts may change in size depending upon activity levels. Doctors may recommend surgery to remove painful or recurrent cysts or enlarge the space around the nerve.