There are several reasons you might get a rash on your butt, including contact dermatitis Heat rash can also happen any time you sweat a lot.
Though most butt rashes are treated with over-the-counter products (or peace out Heat rash happens when sweat gets trapped in your pores.
A butt rash is common in babies, but adults can get them too. Heat rash: This itchy, red rash often appears as blisters or red bumps during hot weather. . sweating heavily; wear loose clothing to prevent rashes from friction.