Try Neutrogena Body Clear Body Wash. If you use hairsprays, body sprays or perfumes put a shirt on before you spray them. Did you recently change your shampoo or laundry detergents...they may be clogging your pores. The posting above mentioned tanning beds as well as a cause (probably from your back sweating and laying in it on the bed). I had this problem as well and have used that body wash for years and it solved my problem but when I switch to ANY other kind of body wash, it comes back. Good Luck!