Dandruff And Itching Scalp

Overview

Dandruff is small flakes of dead skin that come loose from your scalp and settle in your hair, on your clothes and on your shoulders. An itchy scalp is the urge to scratch, and it often comes along with dandruff. Your scalp constantly sheds old skin cells. With dandruff, this shedding speeds up, so the flakes are bigger and easier to see. Dandruff is not a sign of being dirty, and you cannot catch it from someone else. It is a very normal skin problem that can be managed.

Very common. Around half of adults have dandruff at some point, and for many people it comes and goes over the years. It is one of the most frequent reasons people ask a pharmacist about their scalp.

Anyone can get dandruff, at any age. It is most common in young adults and slightly more common in men, often starting around the teenage years and easing later in life. Babies can get a mild, crusty flaking on the scalp sometimes called cradle cap, which usually clears on its own. Older adults may notice flaking because the scalp becomes drier with age.

Symptoms

Common symptoms

• White or grey flakes on the scalp, in the hair, on the eyebrows or on the shoulders
• An itchy scalp that makes you want to scratch, often worse in the evening
• A scalp that feels dry, tight or sometimes greasy
• Mild redness or a slightly pink scalp
• Flaking that gets worse in cold, dry weather or when you are stressed
• Clumps of flakes that look yellow and greasy when the scalp is oily

Symptoms in children

• Cradle cap in babies: yellowish, greasy crusts or scales on the scalp that usually do not bother the baby
• Flaking that appears in the teenage years, when oil glands become more active
• Itching that leads to scratching and sometimes small sore patches
• Flakes in the eyebrows or around the hairline in older children

Symptoms in older adults

• A drier, flakier scalp as skin loses moisture with age
• More flaking when hair is washed less often, which is common if washing becomes harder
• Flaking linked to other skin conditions such as eczema or seborrhoeic dermatitis (a red, scaly rash in oily areas of skin)
• Scalp irritation caused by hair products or by some medicines

Causes

Main causes

• A type of yeast that lives on everyone's scalp — when it grows more than usual, the scalp can become irritated and shed skin faster
• An oily scalp, which gives that yeast more to feed on
• Skin cells renewing too quickly, so flakes build up before they can fall away
• Dry skin on the scalp, especially in cold weather
• Seborrhoeic dermatitis, a common red, scaly rash in oily areas such as the scalp, eyebrows and sides of the nose
• Other skin conditions such as eczema or psoriasis affecting the scalp
• Irritation or allergy from shampoos, dyes, gels or other hair products

Risk factors

• Being a young adult or a teenager, when oil glands are most active
• Having oily skin or oily hair
• Cold, dry weather, or moving between dry indoor heating and cold air
• Stress, which can make many skin conditions worse
• Washing hair very rarely, or using very harsh shampoos that dry the scalp
• Some long-term health conditions and some medicines can make flaking more likely — your doctor or pharmacist can tell you if this applies to you
• A weakened immune system

When to see a doctor

See a doctor urgently if:

• Signs of infection on the scalp: spreading redness, warmth, swelling, pus, or severe pain
• A scalp rash with a high temperature or feeling very unwell
• Sudden hair loss with sores, scaling or broken skin
• Facial swelling, breathing or swallowing trouble after using a hair product — call your local emergency number

Book a routine appointment if:

• Flaking and itching that have not improved after about four weeks of regular anti-dandruff shampoo use
• Scalp itching that disturbs your sleep or affects your daily life
• Red, scaly or crusty patches on the face, eyebrows, ears, chest or in the beard area
• Scalp soreness, weeping or areas that bleed when scratched
• Cradle cap in a baby that spreads beyond the scalp, or comes with poor feeding or irritability
• You are not sure whether it is dandruff or something else

Diagnosis

Most of the time a doctor or pharmacist can tell what is going on just by asking about your symptoms and looking closely at your scalp and hair. There is no special test needed for ordinary dandruff. If the scalp looks red, scaly or unusual, or treatment is not helping, they may consider other skin conditions that look similar.

Tests that may be done

• Usually none — the diagnosis is based on your symptoms and an examination
• A small scraping of skin from the scalp may be checked in a laboratory if an infection is suspected
• Rarely, a tiny sample of scalp skin (a biopsy) may be taken if another skin condition such as psoriasis is suspected

What to expect at your appointment

The check is quick and painless. Your doctor will part your hair to look at the scalp, ask when the flaking started, what products you use, and whether anything makes it better or worse. You will usually leave with simple advice or a treatment to try, and a plan to come back if it does not settle.

Treatment

Dandruff cannot be cured for good, but it can almost always be controlled. The aim is to slow down the yeast on the scalp, soften and remove flakes, and calm irritation. Most people do well with a medicated or anti-dandruff shampoo used on a regular schedule. It often helps to alternate between two different types of shampoo, because the scalp can get used to one.

Self-care at home

• Wash your hair regularly with a gentle shampoo — how often depends on how oily your hair is, but every few days suits most people
• When using an anti-dandruff shampoo, massage it into the scalp and leave it on for a few minutes before rinsing, as the label directs
• Rinse thoroughly, since leftover shampoo can irritate the scalp
• Try not to scratch — gently rub rather than using your nails, as scratching can break the skin
• Avoid very hot water on your hair and scalp, which can dry and irritate skin
• Cut back on styling gels, waxes and sprays for a while to see if it helps
• Wash hats, pillowcases, brushes and combs regularly
• Manage stress where you can, as stress often makes itching worse

Medical treatments

Treatments work in different ways. Some shampoos target the yeast that lives on the scalp. Others soften and lift the flakes so they wash away more easily. Some calm inflammation and are useful when there is redness and scaling, as in seborrhoeic dermatitis. A pharmacist can help you choose an over-the-counter option and explain how often to use it and for how long. If these do not help after several weeks, or if the scalp is inflamed, a doctor can suggest other treatments, sometimes including medicated creams or lotions. Always follow the label or the instructions from your healthcare professional, and check with them before using a product on a baby, on broken skin, or alongside other treatments.

When is surgery considered?

Surgery is not used to treat dandruff or an itchy scalp. Treatment is based on scalp care, shampoos and, when needed, medicated creams or lotions.

Living with this condition

Dandruff is something you manage rather than something you fix once and forget. A routine that works for you — for example, a medicated shampoo a couple of times a week alongside your normal washing — usually keeps flakes and itch in the background. Expect it to flare in cold weather or during stressful times, and have a plan ready rather than waiting for it to get bad.

Lifestyle tips

• Keep a simple hair care routine and stick to products you know suit your scalp
• Wear light-coloured clothing if flakes on dark tops bother you — it makes the day less stressful
• Keep a small comb or brush with you if flakes in your hair feel noticeable
• Limit very hot showers and hairdryer heat close to the scalp
• Try a short period of gentle sunlight if you enjoy being outdoors, but protect your skin from burning
• Notice what makes your scalp worse — weather, stress, certain products — and adjust where you can

Diet and exercise

There is no special diet that cures dandruff, and no single food to blame. Eating a balanced diet and drinking enough water supports healthy skin. Some people find their scalp is oilier after a lot of very rich or sugary food, but this varies from person to person. Regular exercise is good for stress and general wellbeing, which can help skin conditions that flare with stress. If you are thinking about big diet changes or supplements, talk to your doctor or pharmacist first.

Mental health and emotional wellbeing

Flakes and itch can be surprisingly upsetting. Many people feel self-conscious about their shoulders or worry that others think they are unclean, even though dandruff has nothing to do with hygiene. That worry can affect confidence, work and social life. It helps to remember how common this is, and that it usually responds well to treatment. If scalp problems or the worry around them are getting on top of you, tell your doctor. If you ever feel you cannot cope, or have thoughts of harming yourself, contact your local crisis line or emergency services right away — support is available.

Prevention

Dandruff cannot always be prevented, because it is partly linked to the natural yeast on your skin and how oily your scalp is. But you can reduce flare-ups by washing your hair regularly, rinsing well, avoiding harsh products, not scratching, and keeping up with a shampoo routine that works for you. Many people find that continuing to use an anti-dandruff shampoo now and then, even when the scalp looks clear, helps keep flakes away.

Screening programmes

There is no screening programme for dandruff. It does not need routine checks unless you or your doctor notice something that looks different, such as redness, sores or hair loss.

Complications

If left untreated

• Ongoing itching and scratching, which can break the skin
• Broken skin can become infected, causing redness, soreness, weeping or pus
• Temporary hair thinning in areas that have been scratched or inflamed a lot — this usually recovers once the scalp settles
• Flaking that spreads to eyebrows, beard, ears or chest, which may be seborrhoeic dermatitis
• Embarrassment, low confidence and avoidance of social situations
• Missed sleep from an itchy scalp

Long-term outlook

The outlook is good. Dandruff is very common, is not harmful, and can almost always be controlled with regular scalp care and the right shampoo. It tends to come and go, so some flare-ups are normal — but with a routine that suits you, most people keep it comfortably in the background.

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