Dry Scalp vs Oily Scalp: How to Tell the Difference (and What to Do About It)

If your scalp is flaking, your first instinct is probably to grab something moisturizing or medicated. But what if you have been treating the opposite of the problem you are actually dealing with?

I have been working on clients for 25 years, and so often, it is the conversations that never happened that led them to the quick shampoo fix. A shampoo label said for flaking, so they stuck with it, when all along they actually had an oily scalp, and the wrong routine threw their scalp microbiome off even more.

So let's get into the differences between an oily scalp and a dry one, and how your scalp signals that it needs a reset.

What Is Scalp Oil?

Scalp oil, called sebum, comes from your sebaceous glands, the oil producers that sit alongside your hair follicles, even in the little peach-fuzz areas. They release oil onto your skin for good reasons: it protects and lubricates the skin, helps keep it from drying out, and is part of the balance of your skin microbiome.

What Causes Oil to Be Produced?

Your body regulates oil production, but it's influenced by a handful of factors:

Genetics

Diet

Lifestyle

Stress and hormones

What Is an Oily Scalp?

You already know what an oily scalp looks like. Most of us have dealt with it at some point and bought our fair share of clarifying shampoo and dry shampoo to keep up with it.

An oily scalp happens when your sebaceous glands are extra active and make more oil than your scalp needs.

Hormones and genetics play a big role. Oil glands respond to androgens, hormones like testosterone and DHT. Men tend to have more oil gland activity, but women are affected too. Puberty, pregnancy, PCOS and stress can all change how much oil your scalp makes, which is why some people notice it come and go.

Diet may play a part too. Some research suggests that diets high in sugar and refined carbs can affect oil production in the skin.

And what you do to your scalp matters. Piling on dry shampoo for days, or using a clarifying shampoo too often, can leave your scalp irritated and out of balance. A lot of my clients feel like their scalp is "fighting back" when they do that.

When there's a lot of oil on your scalp, a yeast called Malassezia, which lives on everyone's skin, can overgrow. That can lead to inflammation and greasy, yellowish flakes, which is what most people think of as dandruff. Think of it like your scalp catching a cold: its defenses are down, and it can take a while to settle.

What Is a Dry Scalp?

A dry scalp is the opposite. There isn't enough oil, which leaves your scalp feeling tight, scratchy and irritated, with tiny dry flakes, a lot like the skin on your body when it gets too dry.

Your skin's barrier relies on lipids like ceramides to hold moisture in. When that barrier isn't working well, your scalp can't keep the moisture it needs to stay comfortable.

A dry scalp also reacts more to things like hot water, blow dryers, sun, and hot and cold air. What you're left with is small, powdery flakes on your hair and scalp.

Scalp conditions vary a lot, but as you can see, there are different kinds of flaking. No wonder the dandruff shampoo you grabbed didn't give you the results you were looking for.

How Do You Rebalance Your Scalp?

Part of rebalancing is getting your scalp pH back where it belongs, since an off-balance scalp shows up as the same dryness, flaking and oil swings we've been talking about.

It's tempting to clarify harshly or slather on a heavy cream. But a lighter, more consistent approach usually works better and gets you off the hamster wheel of chasing fixes.

If you have an oily scalp

• Wash regularly. Oily scalps often do best with frequent washing, for some people even daily. Use a gentle shampoo so you're cleaning your scalp, not stripping it. (Here's my take on washing and double shampooing.)
• Don't use dry shampoo as a replacement for washing. It soaks up oil but doesn't clean your scalp.
• If you see yellow, greasy flakes, an anti-dandruff shampoo with an active like zinc pyrithione can help with the Malassezia behind them.
• Keep conditioner off your scalp. Use it on your mid-lengths and ends. (More on where conditioner actually goes.)

Your scalp can bounce back, but depending on how off-balance it is, it may take a couple of weeks.

If you have a dry scalp

• Use a gentle, moisturizing shampoo that leaves your scalp feeling comfortable, not tight. You can browse shampoos and conditioners here.
• Wash with lukewarm water. That hot shower your body loves is too drying for your scalp. Some people with a dry scalp also do better washing a little less often.
• If you live somewhere dry, a humidifier can help both your scalp and your skin.

If flaking, itching or redness doesn't improve, or your scalp is painful, see a dermatologist. Conditions like seborrheic dermatitis or psoriasis need proper treatment.

Either way, treating your scalp as the foundation is what real scalp care is about.

An Everyday Healthy Scalp Starts Within

Diet and nutrition

A balanced diet is good for your skin, scalp included. Some research suggests cutting back on sugary, high-glycemic foods may help with oily skin. Many of our customers also love adding Goldie Locks® Hair Supplements to their daily routine.

Stress and hormones

Ongoing stress can affect your skin, and many people notice their scalp gets oilier or more irritated when they're stressed. If you have PCOS or a thyroid problem, work with your doctor on a plan, since those can affect your skin and scalp too.

Lifestyle

Getting enough sleep and taking care of your overall health matter too. It all adds up, because your body keeps the score.