Discoid (nummular) eczema

• Unknown aetiology.
• Coin-shaped lesions on the limbs. Oftne symmetrical.
• Can be intensely itchy.
• The eczema may be vesicular or chronic and lichenified.
• May clear after a few weeks, but tends to recur.
• Secondary bacterial infection is common.
• Typically affects middle-aged or elderly men. Younger subjects may have atopic eczema.
• ∆∆: Tinea corporis, contact dermatitis.
• Rx: A potent or very potent topical steroid + antimicrobial or antibiotic.