HI,
If you do not have history of allergies, this could be an irritation, infection or skn conditions such as dermatitis. Irritant contact dermatitis is caused by excessive contact with irritants such as water, soaps, detergents, solvents, acids, alkalis, and friction. THis may affect anyone, providing they have had enough exposure to the irritant. If it persists, have this evaluated further for proper management. Cold compresses, calamine lotion or over-the-counter anti-histamine medications may help.
Take care and keep us posted.
Sounds like some kind of folliculitus. You could use the acne body wash first and dont scratch um!!