Rashes can be painful or itchy and lead to blisters and raw skin, in some cases. Many things from a heat rash to allergies and sexually transmitted infections can cause butt rashes. Heat rash: This itchy, red rash often appears as blisters or red bumps during hot weather.
Though most butt rashes are treated with over-the-counter products (or Adults often get the rash where skin rubs together, so it may start on.
There are several reasons you might get a rash on your butt, Candida is the most common cause of diaper rash in babies and adults.