Round, coin-shaped patches of angry, intensely itchy skin can be frightening if you’ve never seen them before. Many people worry they’re dealing with ringworm or an infection, when the real culprit is often nummular eczema — a distinct type of eczema with its own triggers and treatment approach.

If you’ve been told you have “eczema,” you might be surprised to learn it isn’t just one condition. Eczema is an umbrella term for several related skin disorders that share features like dryness, itching, and inflammation—but they don’t all look the same or have the same triggers.

Phase 1: Pre‑Writing Analysis

A red, itchy rash that shows up right where your skin touched something? That’s the classic story of contact dermatitis. Understanding what it is—and what sets it off—is the first step to getting it under control.

Tiny, intensely itchy blisters on your palms or sides of your fingers can be maddening—especially when they keep coming back. That pattern is classic for dyshidrotic eczema, a specific type of eczema that mainly affects the hands and sometimes the feet.