<unk>  is caused by Corynebacterium minutissimum. This bacterium tends to thrive in mostly moist and warm environments. Great contributors are poor hygiene, obesity, hyperhidrosis (excessive sweating), aging, diabetes mellitus, and a poorly functioning immune system. Only some of the causable factors can be modified to reduce risk. Hygiene can be improved, along with avoiding moist and warm environments.
Erythrasma
Tinea cruris
Hypertrichosis cubiti
Pitted keratolysis
Xanthelasma
Pachyderma
Ocular melanosis
Onychophosis