Greasy flakes on your scalp and nose could be seborrheic dermatitis, says dermatologist

Greasy flakes on the scalp and across various parts of the face — including the nose, around the beard and the eyebrows — are a complaint many people experience without understanding the underlying cause.

Because flaking is involved, dry skin or an accumulation of dead cells is often assumed to be the culprit. However, the accompanying greasiness can be confusing.

To shed light on the condition and how to treat it correctly, Dr Abigail Waldman, a dermatologist and associate professor at Harvard, posted a video to Instagram on 3 May.

What is seborrheic dermatitis?

According to Dr Waldman, greasy flakes are not the result of dry skin. They are, in fact, a symptom of a skin condition known as seborrheic dermatitis — also referred to as seb derm.

The condition is a reaction to the skin's normal yeast, Malassezia. Whilst chronic, it can be effectively managed with the right treatment approach.

Because awareness of the condition remains limited, many people are not following the correct steps when attempting to treat it at home. Dr Waldman outlined the three most common mistakes.

Mistake 1: Not using the right shampoo

Selecting the appropriate products is crucial when managing a skin condition. Washing the hair with shampoo is the most common approach to dealing with flakes, yet many people reach for the wrong type.

"The first mistake that you're likely making is that you're not using the right type of shampoo. You can't use your regular old moisturising shampoo; it's not going to get that greasy scale off. Instead, you need to use an anti-dandruff shampoo, one with zinc, pyrithione or ketoconazole," Dr Waldman stated.

Mistake 2: Ignoring the face

For those also experiencing greasy flakes on the face, the same anti-dandruff shampoo used on the scalp can be applied directly to facial areas — there is no need for a separate, milder product.

"Mistake number two is that you're ignoring your face, and you can use that same shampoo on your face," the dermatologist explained.

Mistake 3: Not using shampoo correctly

Even when an antifungal shampoo is being used, it is often applied incorrectly or not left on the skin for long enough to be effective.

"You actually really have to use these shampoos more like a mask. Really scrub it in, and then leave it on for about five minutes. That way, the active ingredient can actually start taking effect and get rid of some of that normal yeast," Dr Waldman advised.

She also encouraged anyone whose symptoms persist to seek professional guidance. "If over-the-counter solutions aren't working, see a dermatologist. There are great prescription options (to treat the condition)," she added.

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.