Shampoos, conditioners, and styling products can cause whiteheads and other types of acne in these areas. The bumps can be so subtle that you can feel but not see them. Some people develop numerous, closely packed bumps that they can see. Even if you've never had acne, hair care products can cause breakouts.

Can you get acne from conditioner?

"Washing and conditioning your hair can cause 'backne,'" Kidd said. "First things first, when you wash your hair, be sure to completely rinse out all the shampoo. Then, after you apply conditioner, make sure it gets thoroughly rinsed out too.

What hair products cause acne?

Many hair products are oil based, which may trigger acne in those who are already prone, but ingredients such as petroleum, silicone, cocoa butter, sodium lauryl sulfate, ammonium lauryl sulfate, mineral oil, jojoba oil, coconut oil, and lanolin can also trigger acne, especially if left on the skin.