Almost 20-30 % of the population in UK and USA have skin diseases. 10 % ending up in seeing their family doctors for treatment.
Skin diseases can harm individuals in a number of ways.
Itchin or pain eg. Eczema
Embarassment and withdrawal eg. Birth marks, acne vulgaris etc.
Loss of work and wages eg dermatitis of hands and feet
Rare but still seen eg,.angioderman, metastatic skin diseases.
There are more than 2000 skin conditions. I will list as the more common ones.