Patches on the skin tend to begin as a group of tiny, reddish spots and blister-like sores that weep fluid. Then the sores enlarge and grow together to form a coin-shaped patch.
The patches tend to have these signs and symptoms:
- Range in size from smaller than 1 inch to bigger than 4 inches.
- Occur most often on the legs but also occur on the torso (middle of the body), arms, hands, and feet.
- Be pink, red, or brown and well-defined.
- Itch and burn: These symptoms range from very mild to severe. The itch may be worse at night, disturbing sleep.
- Become crusty after the blisters leak fluid and, after a long time, become scaly.
A yellowish crust may develop on the patches if a Staphylococcus aureus (staph) infection occurs. This may require treatment with an antibiotic.
The skin between the patches often remains clear, but it can be dry and easily irritate.
Nummular dermatitis: Blisters can form and grow together to create red patches. Nummular dermatitis: A patch of nummular dermatitis on a patient's ankle.
Learn more about nummular dermatitis:
Images used with permission of the American Academy of Dermatology National Library of Dermatologic Teaching Slides.