Why is my scalp so itchy?
An itchy scalp can nearly drive you mad. It disturbs your sleep, it’s embarrassing to scratch in public, and scratching makes it worse: it breaks the skin, inflames it further and can lead to infection.
Itch is a symptom, not a diagnosis. Most itchy scalps have a cause that can be found and treated, and many of the people I see have been using the wrong product for the wrong condition for years.
Use the table below to see what your symptoms might point to, then read the guide for that condition.
The short answer
An itchy scalp is most often caused by dandruff, seborrhoeic dermatitis, a reaction to a hair product or dye, psoriasis or head lice. Less often, it’s a dry scalp, an infection or a nerve problem. The treatment depends on the cause, which is why shampoo after shampoo often doesn’t help.
What causes an itchy scalp?
These are the common causes and what usually goes with them. Some people have more than one at the same time.
| If you notice… | It could be |
|---|---|
| White or grey flakes on your shoulders, itch worse between washes | Dandruff |
| Greasy yellowish scale and redness, also on eyebrows, ears or beside the nose | Seborrhoeic dermatitis |
| Thick, raised, silvery-scaly patches with clear edges | Scalp psoriasis |
| Itching, redness or burning after a new dye, shampoo or product | Scalp eczema and contact dermatitis |
| Fine, powdery flakes and a tight feeling, worse in winter | Dry scalp |
| Intense itching, especially behind the ears and at the nape, in a child or family | Head lice |
| Small itchy or sore spots around the hairs | Scalp folliculitis |
| Scaly patches with broken hairs, usually in a child | Scalp ringworm |
| Itching or burning with redness around the hairs and patches of hair loss | Scarring alopecia |
Flaking is rarely caused by dry skin. It’s usually the scalp renewing itself faster than normal, and the flakes are often slightly greasy. That’s why moisturising oils often make an itchy, flaky scalp worse rather than better.
Itchy scalp with no dandruff
If your scalp itches but there are no flakes, the most likely causes are:
- Head lice, in children and the adults around them
- A reaction to a product, especially a new dye, shampoo or styling product
- Product build-up from dry shampoo, sprays and serums that aren’t fully washed out
- Sweat and heat under hats, helmets, wigs or tight styles
- Folliculitis, which may start as itchy bumps before spots appear
- Nerve-related itch, sometimes called scalp dysaesthesia, where the scalp itches, burns or tingles with nothing to see
Can stress cause an itchy scalp?
Stress doesn’t usually cause an itchy scalp on its own, but it can make almost every itchy scalp condition flare, including dandruff, seborrhoeic dermatitis, eczema and psoriasis. It also lowers your threshold for itch, so you notice it more.
Scratching can become a habit, especially when you’re anxious or concentrating. Over time it can thicken the skin, which then itches even more. Breaking this itch–scratch cycle is often part of treatment.
How to stop an itchy scalp
These steps help almost any itchy scalp while you find out what’s causing it:
- Wash your hair regularly. Leaving it longer between washes lets oil, scale and product build up.
- Use lukewarm water rather than hot, and rinse shampoo and conditioner out thoroughly.
- Choose fragrance-free products, and stop any new product that seemed to start the itching.
- Keep conditioner on the lengths of your hair, not your scalp.
- Try not to scratch. Press or pat the itchy spot, and keep your nails short.
- If you have flakes, try an anti-dandruff shampoo for a month before deciding whether it works.
Itchy scalp treatment and when to get help
Treatment depends entirely on the cause: an antifungal shampoo for dandruff, avoiding the trigger for a product reaction, a lice treatment for head lice, prescription lotions for psoriasis. Using the wrong one can irritate an already sore scalp.
It’s worth getting your scalp looked at if:
- the itching has lasted more than a few weeks, or keeps coming back
- anti-dandruff shampoos haven’t helped
- your scalp is red, weeping, bleeding or crusted
- you’re losing hair, or have patches of hair loss
- a child has scaly patches or broken hairs
Get urgent help if your face, eyes or lips swell after using a hair dye, or you feel unwell. Call 999 if you have any difficulty breathing.
How I can help
At a consultation in Forest Row we spend about an hour together. I examine your scalp closely, ask when the itching started and what makes it better or worse, and go through your products, washing routine, health and stress.
Once we know the cause, you leave with a written plan, and often something you can start using straight away. If you need a prescription treatment, I’ll write to your GP. Please bring a list of the products you use and anything you’ve already tried. What happens at a consultation.
When to see your GP first
Please see your GP or call NHS 111 if:
- your hair loss came on suddenly and you feel unwell
- your scalp is very painful, swollen, weeping or bleeding
- you have patches of hair loss with redness or scarring that are spreading quickly
- you think a new medicine may be the cause. Don’t stop it without speaking to your doctor
You can still see me as well. I’ll happily liaise with your GP if further tests are needed.
Questions about an itchy scalp
If yours isn’t here, send me a message and I’ll get back to you.
Why does my scalp itch more at night?
Itch often feels worse at night because there are fewer distractions and your skin is warmer. Sweat on the pillow and some conditions, such as head lice and eczema, can also be worse at night.
My anti-dandruff shampoo worked, then stopped. Why?
Usually because it isn’t only dandruff. Seborrhoeic dermatitis, psoriasis or a reaction to the shampoo itself can all look similar. Medicated shampoos can also irritate if used too often.
Can an itchy scalp cause hair loss?
Itch itself doesn’t, but scratching breaks hairs, and inflamed scalps can shed more. Itching with patches of hair loss needs checking early, as a few scarring conditions start this way.
Is an itchy scalp a sign of hair growth?
No. New hair growth doesn’t make the scalp itch. If your scalp is itchy, there’s usually another cause.
Can hair dye make your scalp itchy?
Yes. Dye is one of the most common causes of an itchy, red scalp, either from irritation or an allergy to an ingredient such as PPD. Hair dye allergy.
Let’s find out what’s going on
Book online at a time that suits you. If you have a question first, send me a message.