Washing your hair too often? Experts warn about this shocking mistake

“Should I really wash my hair every day?” A dermatologist weighs in

“Some people simply believe they have to wash their hair every day, otherwise it’ll become extremely greasy,” pointed out Dr. Anthony Rossi, a dermatologist at Memorial Sloan Kettering Cancer Center in New York City and member of the American Academy of Dermatology Association, in an interview with CNN.

In reality, it gets far more complicated than that, according to Dr. Rossi. There are several factors to consider before you lather up and rinse:

• Hair type and texture (straight, curly, coily, fine, or thick…)
• Whether your hair tends to get oily quickly
• Your level of physical activity

Think about it: someone who bikes or walks to work every day, or has a physical job, is naturally more exposed to dust, sweat, and pollution—which means their hair is likely to need more frequent washing than someone who drives to work or works from home most days.

One size does not fit all: How your hair type and life affect the rules

Certain hair textures need a little more love (and a little less shampoo). Curly or coily hair is more likely to get dry or even brittle, so frequent washing can actually be harmful—think frizz, breakage, and a tragic lack of bounce. On the flipside, if you have straight hair, you may need to wash a bit more regularly to avoid that all-too-familiar oily look.

But there’s an added catch: As Dr. Rossi explains, washing your hair too frequently can dry it out and make it look dull. On the other hand, letting sebum build up can lead to funky odors and even dandruff. It’s all about balance!

So… how often should you wash?

If you’re seeking a magic number, here’s the best guideline from Dr. Rossi: wash your hair at least once or twice a week. If your hair is on the drier side, you can get away with a bit less; if it gets greasy more often, you might need to wash it a bit more—possibly even daily, but only if your scalp demands it.

Age is another key factor. During puberty, those hormonal surges can lead to excess sebum (oil), requiring more frequent washing. As we age, though, our scalps naturally dry out, so it’s wise to space out washes a little more.

Caring for your scalp: It matters too

Don’t forget your scalp! Dr. Rossi reminds us to treat our scalp with the same attention we give our skin. That could mean regular massages (with or without nourishing oils) and brushing your hair daily to remove dust, dirt, and dead skin cells.

In the end, there’s no one-size-fits-all answer—because we’re all gloriously unique (and our hair is, too). Listen to what your scalp and strands are telling you. Your hair will thank you!