Seborrhoeic dermatitis: how to control scalp flare-ups

Persistent itching, greasy roots just hours after washing and flaking accompanied by redness may point to more than temporary dandruff. These are common signs of seborrhoeic dermatitis, an inflammatory condition affecting the scalp that needs attention to prevent flare-ups from becoming increasingly uncomfortable.

What is seborrhoeic dermatitis?

Seborrhoeic dermatitis is an inflammatory condition that mainly develops in areas with higher oil production, including the scalp. Its most common symptoms include itching, redness, irritation and flakes, which can range from fine and white to thicker scales.

Although it is often mistaken for poor hygiene, the condition is not caused by washing the hair too infrequently. It is linked to individual factors, sebum production and the skin's inflammatory response. As a result, some people may have no symptoms for months before experiencing further flare-ups at particular stages of life.

Why can symptoms become worse?

Flare-ups may become more severe when several triggers occur at once. Stress, hormonal changes, cold weather and using products that irritate the skin are among the factors that can increase itching, oiliness and scalp flaking.

Another relevant factor is Malassezia, a microorganism naturally present in the skin microbiota. In people with a predisposition, its interaction with oiliness can contribute to inflammation. This is one reason why managing dermatitis usually requires ongoing care rather than action only during flare-ups.

What care helps control seborrhoeic dermatitis flare-ups?

Minor adjustments to a daily routine can reduce irritation and make the scalp feel more comfortable. Product choice, water temperature and even the habit of scratching the area can affect symptom severity, particularly when the skin is already sensitive.

• Use shampoos designed to manage oiliness and flaking, following professional guidance where a specific treatment is prescribed.
• Avoid washing your hair with very hot water, as high temperatures can worsen skin dryness and irritation.
• Do not scratch the scalp, as friction can cause small injuries and aggravate inflammation.
• Wash your hair at a frequency suited to how oily it becomes, helping to prevent excessive sebum build-up.

It is also important to monitor how the scalp responds to new cosmetic products. Overly harsh or unsuitable products can increase discomfort for some people. If flare-ups tend to recur, maintaining a straightforward, consistent routine is usually more helpful than changing products frequently.

Watch the video shared by the YouTube channel Dr Claudio Wulkan: Aesthetic Dermatology Lasers, which offers advice on managing seborrhoeic dermatitis.

When should you see a dermatologist?

Not every case of flaking requires immediate medical treatment, but certain symptoms should be assessed. Severe itching, sores, pain, discharge or persistent hair loss may mean that the diagnosis needs to be confirmed and that other scalp conditions with similar symptoms should be ruled out.

Depending on the severity of the condition, a dermatologist may recommend medicated shampoos, lotions or other treatments to reduce inflammation and manage recurrence. Follow-up also helps establish the right frequency for using products, preventing both inadequate treatment and unnecessary overuse.

How can you keep the scalp healthy for longer?

Managing seborrhoeic dermatitis requires consistency, even once itching and flaking have disappeared. Washing the hair properly, avoiding excessively hot water, reducing stress factors where possible and following a dermatologist's advice can help reduce the frequency and severity of new flare-ups.

The scalp often shows warning signs before discomfort becomes severe. For that reason, do not dismiss redness, excessive oiliness or persistent flaking. Pay attention to changes and care for the area from the first symptoms, especially if flare-ups are becoming more frequent or harder to manage.