APA Dictionary of Psychology

a skin disease involving an area of a finger where a ring usually is worn. The condition may be marked by itching, dryness, redness, or eruption of small blisters. If the condition is not caused by irritation from or an allergic reaction to metals or agents in the ring or in detergents trapped beneath the ring (the most common cause), ring-finger dermatitis may be a psychosomatic disorder.