<unk>  normally appears during warm weather. Due to excessive sweating and friction, in for example athletic shoes, the skin can start to exfoliate. Other factors that can cause exfoliation are detergents and solvents. Another very common cause has been reported from salt water fishermen, who often suffer from these symptoms. It is not sure whether it is from the salt water or whether it is from some bacteria from fish.
Keratolysis exfoliativa
Tinea versicolor
Tinea faciei
Keratoderma blennorrhagicum
Granuloma faciale
Lentigo simplex
Herpes labialis
Streptococcal intertrigo