For years, I told my clients not to wash their hair too often.
I said it with confidence. I said it often. I told them it would strip their hair. Dry it out. That going longer between washes was better — that their hair would "train" itself to produce less oil if they just pushed through the greasy stage.
I was wrong.
Not about everything. The intention was right — most women were overwashing with harsh, sulfate-heavy shampoos that genuinely stripped colour and moisture. The advice made sense in context. But the conclusion we drew from it — wash less, as a blanket rule — was incomplete. And for some women, it's been quietly doing damage for years.
What I Didn't Fully Understand
I'm studying trichology now. And one of the things that shifted my thinking completely is understanding just how many glands the scalp contains.
Your scalp has a higher concentration of sweat glands and sebaceous (oil) glands than almost any other part of your body. More than your underarms. More than your groin. It's one of the most metabolically active areas of skin you have — producing oil, sweating, shedding cells, and housing the follicles responsible for growing every strand on your head.
Now consider this: if any other part of your body with that many glands was itchy, flaky, oily, or shedding — you wouldn't skip washing it for a week. You'd be concerned. You'd see a doctor. At the very least, you'd give it some attention.
But somehow, the scalp became an inconvenience. Something we work around rather than look after. Something we hide under dry shampoo and hope for the best.
The "Don't Wash Your Hair" Myth
The idea of washing less took hold for understandable reasons. Over-cleansing with the wrong products can absolutely compromise hair — especially colour-treated, fine, or chemically processed hair. Nobody is arguing with that.
But "don't wash too often" became "don't wash," which became a culture in which women went four, five, six days, or even weeks between washes and believed that was optimal. It isn't.
When sebum, sweat, dead skin cells, product residue, and environmental debris accumulate on the scalp over days, the follicular environment suffers. The pores can become blocked. The skin can become inflamed. The pH balance shifts. And the hair that's forming beneath the surface — the hair you won't see for weeks or months — is being produced in a compromised environment.
You're not ruining your hair by washing it. You're potentially compromising the next generation of hair by not washing your scalp.
Why This Matters More Than You Think
Every strand of hair on your head begins its life inside a follicle, embedded in your scalp. The health of that follicle — its blood supply, its sebum balance, its freedom from inflammation — directly affects the quality of the hair it produces.
If the scalp is congested, inflamed, or imbalanced, the hair that grows from it will reflect that. It might be finer. It might be weaker. It might shed earlier than it should. And no amount of conditioning, masking, or styling will compensate for hair that was compromised before it even emerged.
This is why scalp health isn't a trend or an add-on. It's the foundation. Everything else — colour, cut, texture, movement — sits on top of it.
The Curly Hair Conversation
This comes up constantly, and it's worth addressing directly.
Many women with curly or textured hair wash infrequently — sometimes once a week or less. And the reasons are real: curly hair takes longer to wash, longer to dry, and behaves unpredictably from one wash day to the next. The inconsistency is exhausting. The time commitment is significant. So the instinct to stretch washes is completely understandable.
But scalp health doesn't make exceptions for curl patterns.
If your scalp is itching, flaking, producing excess oil, or shedding more than usual, those are signals — not inconveniences. Your curl type doesn't exempt your scalp from needing to be clean, balanced, and functioning properly.
The solution isn't necessarily washing more often with the same products. It might mean finding a cleanser that works with your texture. It might mean separating scalp care from hair care — treating them as two different conversations, because they are.
What "Clean" Actually Means Now
Here's the part that's changed: the products.
A decade ago, "washing your hair" often meant using inferior shampoo that indiscriminately stripped everything. Today, professional cleansers are formulated to clean the scalp without compromising the lengths. They're pH-balanced, colour-safe, and designed to remove buildup without removing moisture.
No hair should be "stripped" from washing it with the right product. That's an old story. It's time to update it.
Healthy hair starts with a clean, balanced scalp. Not an over-cleansed one. Not a neglected one. One that's been given the same consideration you'd give any other part of your body that's working that hard.
When Washing Isn't Enough
If you've upgraded your routine — washing more regularly with professional products — and your scalp is still irritated, flaky, oily, or shedding, that's actually useful information.
It means the issue likely isn't topical. It gives us a much clearer picture of what else might be going on in your system — hormonal shifts, nutritional gaps, stress responses, or internal imbalances that are showing up first at the scalp.
A clean scalp isn't just better for your hair. It's a diagnostic baseline. Once the external factors are addressed, anything that persists points us toward something deeper. And that's where the real conversation begins.
Common Thread is a boutique hair studio in Pukekohe specialising in colour, texture, and hair health. For bookings click here.
