Parakeratosis pustulosa (PP) is a cause of distal nail inflammation and nail dystrophy ... atopic dermatitis, or other skin diseases (Hjorth & Thomsen, 1967). There is no specific treatment ...

Onychomycosis, or fungal infection of the nail, most often affects the toenails. Infected nails usually have a thick, yellow appearance and can become coarse and brittle (see Figure 4).