what causes finger cysts to form
exists and is an alternate of . The most common cause of a cyst in the finger is related to arthritis. An arthritic joint produces more fluid than normal joints and the fluid escapes, thickens and forms a fluid collection outside the joint and is visible underneath the skin. The most common location for these cysts is at the base of the nail. The most common cause of a cyst in the finger is related to arthritis. An arthritic joint produces more fluid than normal joints and the fluid escapes, thickens and forms a fluid collection outside the joint and is visible underneath the skin.