It is estimated that the incidence of focal<unk>  may be as high as 2.8% of the population of the United States. It affects men and women equally, and most commonly occurs among people aged 25–64 years, though some may have been affected since early childhood. About 30–50% of people have another family member afflicted, implying a genetic predisposition. In 2006, researchers at Saga University in Japan reported that primary palmar<unk>  maps to gene locus 14q11.2–q13.
Hyperhidrosis
Pitted keratolysis
Dyshidrosis
Dysosmia
Anosmia
Picardy sweat
Aspermia
Nyctalopia