Sharply defined, scaling borders. Infected first, second, third nails. Misdiagnosed as eczema and treated with topical steroids. Nails and skin cleared with terbinafine 250 mg q.d. 6 weeks.

Topical steroids were prescribed and infection lost characteristic tinea features. Scaling border and surface scale disappeared. Plaque thickened and became painful. This is called tinea incognito.

Thick palmar scale often considered dry skin. Mildly itching infection similar to that on soles. One hand involved typical. Check feet for same pattern. Recurrence common even after oral medication.