What Is the Main Cause of Dandruff?

Malassezia normally lives on the skin, but scalp oil can support changes that trigger irritation in some people. The scalp then releases visible flakes. Cold, dry weather, stress, harsh hair products and infrequent washing may make flaking more noticeable, but dandruff is not caused by poor hygiene alone. It may occur without redness, or alongside itch and greasy scale as part of seborrheic dermatitis.

Flakes can look white or yellow and may settle on hair, clothing or the shoulders. An itchy scalp and flaky scalp are symptoms rather than proof of one specific cause.

Wash the scalp regularly with a gentle routine and avoid scratching, which can break the skin and increase irritation. A medicated shampoo may contain an ingredient that reduces yeast, loosens scale or calms inflammation; use it according to its label and allow it to contact the scalp as directed. If one product irritates your skin or does not help, a dermatologist can choose another approach, such as topical antifungal treatment.

Arrange a dermatology assessment if flaking is severe, painful, spreading beyond the scalp, associated with oozing or thick plaques, or not improving with appropriate self-care. Prompt review is also sensible when hair loss, marked redness or swelling appears, because another scalp condition may need different treatment.

Ask whether your pattern fits dandruff or seborrheic dermatitis, which shampoo ingredient suits your scalp, how often to use it, and what signs would mean you should return for reassessment.