Ask an Expert: Why You Can (and Maybe Should) Wash Your Hair Every Day

For years we’ve been told to “train” our hair to go longer between shampoos. But that advice doesn’t work for everyone, and in some cases, it may actually make things worse.

We asked Kelly Smith, a double certified clinical trichologist and owner of The Hair Loss Clinic at Salon Ceallach in Powell, TN, what you need to know about shampooing your hair, and why your scalp really matters.

Washing your hair daily might not be a bad thing

Q: We’ve always heard that washing your hair every day is bad. Is that actually true?

Not necessarily. As a clinical trichologist, I don’t believe there’s a one-size-fits-all rule when it comes to washing your hair. I look at scalp health, not just hair type. Healthy hair starts with a healthy scalp.

For some people, washing their hair daily is what their scalp needs. Especially if you’re dealing with oil, buildup or inflammation, going longer between washes can make those issues worse.
I also use separate products for my scalp and hair.

Q: So how do you know how often you should be washing your hair?

You have to take into account what’s happening with your scalp. If you have an oily scalp, you may need to wash your hair every other day or every day. But it’s not always that simple: You may have an oily scalp and dry hair, so you have to find the right balance. I always tell people if you’re not sure what your hair and scalp need, it’s worth getting a professional scalp analysis by a trichologist instead of guessing.

Q: What happens if you don’t wash often enough?

Buildup is the big issue. Your scalp can get congested with sebum, product residue, sweat, and minerals from hard water. Over time, that buildup can clog hair follicles, which affects how your hair grows and the quality of the hair itself.[1]

If you’re noticing itchiness, irritation or sore spots that feel like pimples, these may be signs of inflammation or conditions like folliculitis that can impact hair growth.[2]

Q: You mentioned hard water. How does that play into scalp health?

It’s a bigger factor than most people realize. If you’ve ever seen white film on your shower walls that you have to give a hard scrubbing to, that’s calcium buildup coming from the water, and the same thing can happen on your scalp. That’s why I always recommend using a shower filter. If you’re not starting with clean water, you’re basically putting those minerals right back onto your scalp every time you wash, which can impact the health of the hair follicles and hair growth.

Q: What are signs that your scalp isn’t as healthy as it could be?

If someone comes to me and says "my scalp is oily or itchy and I don’t know what to do with it", I look at a lot of different things. Are the follicles congested? Is there inflammation? The scalp works from the inside out and there could be an imbalance on the outside or inside. That’s where your microbiome [the microorganisms that live on the scalp’s surface and hair follicles] comes in. An unbalanced microbiome can cause dandruff, irritation and even lead to hair loss.
Another piece people don’t think about is that the skin on your scalp ages faster than the rest of your body. It needs support just like the skin on your face does, which means protecting the scalp barrier and keeping the microbiome balanced.[3]

Q: What should you look for in a shampoo if you’re washing frequently?

You don’t want to have any harsh products. You want to make sure that your shampoo and conditioner are free of parabens and silicones and ideally you want to get these from a place that has professional-quality products. The PH balance of your scalp is important; that’s usually in a slightly acidic range so you want a shampoo that will help balance that. [4]

The Takeaway

When it comes to washing your hair, there’s no universal rule and less is more isn’t always better. The real goal isn’t to stretch out time between washes, it’s to keep your scalp healthy and balanced. If you’re dealing with oil, buildup, or irritation, washing more frequently can actually support hair growth by keeping follicles clear and the scalp environment in check. On the flip side, if your hair is drier or textured, you may not need to wash as often.

Kelly Smith is a certified clinical trichologist through the United States Trichology Institute and the American Medical Certification Association. She’s the owner of The Hair Loss Clinic at Salon Ceallach in Powell, TN and has been a cosmetologist for 21 years.

She’s also a certified professional instructor, collaborating with top companies in the hair industry, contributing to research and development for new products and innovations.

Inside her clinic, she offers a Trichology Head Spa and works with a wide range of concerns including shedding, thinning, scalp irritation, buildup, and overall scalp imbalance, taking a multi-therapeutic approach, supporting both the scalp and internal factors that can impact hair health. 

Her passion is helping people understand their scalp, restore hair health, and ultimately feel confident again.

Frequently Asked Questions

Can washing your hair too often cause dryness or damage?

It can, but it really depends on what you’re using. Frequent shampooing with harsh formulas can strip the hair of its natural oils, leaving it dry or brittle. But if you’re using gentle, well-formulated products, daily washing doesn’t have to be damaging. It’s less about frequency and more about choosing the right products for your hair type.

Does your hair type change how often you should shampoo?

Yes. Hair texture plays a role in how oil moves from your scalp down the hair shaft. Straight hair tends to get oily faster, so that may mean more frequent washing. Curly types often stay drier  because oil doesn’t travel as easily, so this may mean less frequent washing. But don’t forget about your scalp; keeping it clean and balanced is key to the health of your hair.

Are there signs that you might be overwashing?

It’s all about balance; You want your hair to look and feel good but you also want your scalp to be clean and balanced, too. If your hair feels dry, brittle or more prone to breakage, or if your scalp feels tight or irritated after washing, you may be overdoing it and/or using products that aren’t agreeing with your scalp and hair. Adjusting your shampoo and looking into using a scalp care product may help restore balance.