What is seborrheic dermatitis?
Seborrheic dermatitis is an eczema that develops on areas where sebum is actively secreted, such as the head, hairline, and face.
The affected area is reddish with a slightly yellowish, moist dandruff or dry, scaly dandruff.
It can be terrible and dandruff can harden and become like a scab.
There are "infant type" seen from newborn to infancy and "adult type" seen in adults after puberty.
It is said that Malassezia, a type of fungus that is resident on the skin, is involved in the development of seborrheic dermatitis.
The growth of Malassezia, which is nourished by sebum, on the skin itself is thought to cause skin inflammation.
Malassezia breaks down the component "triglycedo" contained in sebum into free fatty acids, and the irritation of the skin by the free fatty acids is also thought to be the cause of dermatitis.
The root cause of the abnormal growth of Malassezia is still unknown, but changes in sebum components and secretions due to the environment, abnormal metabolism of vitamins B2 and B6, lack of bathing and face washing, stress, lack of sleep , It is said that factors such as hormonal disturbance are related.
Adult seborrheic dermatitis is common in men after puberty and is thought to be related to the effects of the male hormone (androgen), which stimulates the secretion of sebum.
It is often found on the scalp and hairline, eyebrows, sides of the nose, behind the ears, under the armpits, chest, crotch, and back of the knees. These sites are areas where sebaceous glands that secrete sebum have developed and are called seborrheic sites.
It is painless and, in most cases, itchy, but it can also be mild.
The affected skin becomes red, and yellowish, greasy, moist dandruff or dry, scaly dandruff appears tattered.
In severe cases, dandruff, peeled skin, and exudate may solidify and cover the affected area with something like a scab.
Most infantile seborrheic dermatitis is transient and, with proper skin care, usually heals spontaneously around 8-12 months of age.
Adult seborrheic dermatitis that occurs after puberty, once it develops, gets better and worse, often with a chronic course. When the symptoms get worse, they rarely heal spontaneously and require proper hospital treatment.
Symptoms such as itching and dandruff on the scalp can also occur due to rashes (contact dermatitis) caused by unwashed shampoo and conditioner, but if the symptoms persist, they are seborrheic dermatitis. There is a possibility. If there is no inflammation such as redness of the skin and only dry dandruff appears, it may be called "dandruff" called pityriasis rosea or dry seborrhea.
There are several other diseases with similar skin symptoms, such as atopic dermatitis and candidiasis caused by another type of mold. It is difficult to distinguish between them, and specialized treatment is required according to the illness, so if you have any symptom you can think of, see a dermatologist. However, eczema can occur due to mechanical stimuli such as raising nails on the head, scrubbing, and plucking dandruff, so if you change such lifestyle, eczema on the head and face other than seborrheic dermatitis May get better.
Seborrheic dermatitis is a condition in which the affected area is inflamed. In dermatology, topical steroids are generally used to control inflammation. Depending on the symptoms, topical antifungal agents that suppress the growth of mold may be used in combination.
Things to watch out for in your daily life
The antifungal drug ketoconazole topical drug (NIZORAL) is the mainstay of treatment.If itching is strong or inflammation is strong such as erythema, use external steroids (LOCOID, ANTEDATE, etc. are used according to the part of the body).It is a disease that easily relapses, so skin care is important after the symptoms have subsided.
Seborrheic dermatitis：Drug therapy
1) When there are no subjective symptoms and dandruff is the main focus.
NIZORAL Cream 2 times / day for face and trunk
NIZORAL Lotion 2 times / day in the case of head
PYDOXAL Tablet (20mg) 1 tablet / time 3 times a day after each meal
2) When itching is strong or erythema is conspicuous
LOCOID Ointment 1-2 times / day for face
ANTEBATE Cream 1-2 times / day for trunk
ANTEBATE Lotion 1-2 times / day for the head
Zyltec Tablet 10mg 1 tablet / time Take before going to bed
ALESION Tablet 20 mg 1 tablet / time, taken once a day.