I have a cyst on my upper forearm according to the er. they told me to keep it wrapped but every time i wrap it my hand and wrist swell up. ?

Too tight: I presume you are to keep it wrapped/bandaged because it is draining or infected? This may be fine, but it sounds like you may be wrapping it too tightly. This causes obstruction of the venous blood and lymph flow back up your arm, and resultant swelling down below. Try wrapping it more loosely. Infection should soon resolve; no other reason to wrap a cyst!? Good wishes:)