Acne vs Seborrheic Dermatitis

For most people it settles by the mid-twenties. About one in six women still has it into her 30s and 40s, and it can return after pregnancy, after stopping the pill, or with any hormone shift. Controlled rather than cured.

Less than the internet suggests. The evidence points at high-glycemic diets - sugar and refined carbohydrate - and, less consistently, at skim milk. Chocolate and greasy food never held up, and no diet replaces treating the skin.

That is purging. Retinoids speed up clogs already forming under the surface, so weeks of spots arrive at once. It peaks around weeks two to six and settles by week eight. Still worsening past 10 to 12 weeks is irritation, not purging.

No. Squeezing pushes the contents sideways into surrounding skin, turning a spot that would have gone in days into a mark that lasts months, or a scar that lasts forever. A large, painful lump can be injected in clinic instead, and settles in a day or two.

Sometimes, but never alone and never for long. They go alongside benzoyl peroxide or a retinoid, usually for three to four months, then stop while the topical carries on. Alone or indefinitely, they stop working and drive resistance.

Almost all acne is hormonal - hormones drive oil production. The label only matters if it changes treatment: deep spots along the jawline and lower face in an adult woman, flaring before periods, usually respond better to hormonal treatment than to antibiotics.

The same process at different intensities. Dandruff is the mild end - flaking and itch with little visible inflammation. Seborrheic dermatitis is the fuller version, with inflamed, discolored skin and greasy scale, and it can involve the face, ears and chest too. The same treatments work for both, and many people move between them over the years.

The infant version clears on its own, almost always within the first year. The adult version is long term. It is very treatable, and most people keep it more or less invisible with a once or twice weekly routine, but controlled is not cured. It fluctuates with season, stress and general health, so quiet spells are normal and not proof it has gone.

For most people it helps, because washing removes the oil and scale the yeast uses. That does not suit every hair type, and frequent washing of textured or treated hair can do real damage. If two or three times a week is not realistic, ask for a leave-on antifungal foam, lotion or cream, or apply the shampoo to the scalp in sections without lathering the length. The plan should fit your hair.

No, on both counts. Malassezia lives on the skin of essentially every adult as a normal resident. Seborrheic dermatitis is your immune system reacting to that normal resident, not an infection you caught, and nobody can catch it from you.

It does not destroy hair follicles or cause permanent hair loss. Severe inflammation and persistent scratching can cause temporary shedding, which recovers once the scalp settles. Hair lost in a defined pattern, or a scarring scalp with smooth bald patches, is a different problem and worth having looked at.

Because the creases beside the nose and the eyebrows are where seborrheic dermatitis lives, and it is easy to read that as your products drying you out. More moisturizer will not shift it, and acids and scrubs make it worse. The test is simple - an antifungal cream a few times a week there usually improves it within two weeks.