What Causes Dandruff? Common Triggers and How to Care for Your Scalp

White flakes on your shoulders and an itchy scalp can be frustrating. Dandruff is common, and it does not automatically mean your hair is dirty. Understanding the possible causes can help you choose a more suitable scalp-care routine.

What causes dandruff?

Dandruff is often linked to a scalp condition called seborrhoeic dermatitis. A yeast called Malassezia naturally lives on the skin. In some people, the scalp's response to this yeast and its natural oils can contribute to irritation and flaking. Dandruff is not contagious.

Common triggers and look-alike problems

• An oily, irritated scalp: Dandruff can occur on an oily scalp, sometimes with greasy flakes and itching.
• Dry skin: Dryness can also cause flaking, but dry-scalp flakes are not necessarily dandruff.
• Sensitivity to hair products: Some products can cause irritation or contact dermatitis, leading to itching, redness and flakes.
• Product buildup: Residue may make the scalp feel uncomfortable or look flaky. Buildup alone does not explain every case of dandruff.
• Other skin conditions: Eczema and psoriasis can resemble dandruff and may need a different approach.

Stress and seasonal changes may make symptoms worse for some people. The cause is not always obvious from the appearance of the flakes alone.

How to manage dandruff gently

Wash your hair regularly using a routine that suits your scalp and hair type. If you have dandruff, consider a shampoo specifically labelled for dandruff and follow its directions, including how often to use it and how long to leave it on. A pharmacist or dermatologist can help you choose a suitable option.

Avoid scratching or scrubbing your scalp aggressively. If a new product causes burning, redness or increased itching, stop using it. Keep your routine simple rather than layering several scalp treatments at once.

Do not assume that applying more oil will solve flaking. An oily scalp can also have dandruff, and heavy oiling may not suit everyone. Avoid harsh home remedies such as undiluted essential oils or lemon juice, which can irritate sensitive skin.

When should you see a dermatologist?

Seek medical advice if your scalp is very red, swollen, painful, bleeding or oozing; if you notice patchy hair loss; or if symptoms persist despite using an anti-dandruff shampoo as directed. Flaking on the face or other parts of the body is also worth discussing with a clinician.

The takeaway

Dandruff is a scalp concern, not a sign of poor hygiene. A gentle routine and an appropriate anti-dandruff treatment can help, but persistent or severe symptoms deserve professional advice.

This article provides general information and is not a diagnosis or a substitute for medical advice.