What Is Seborrhea?

What is seborrheic dermatitis? We often hear this term, but many people just intuitively think that more oil is seborrheic dermatitis. So how does medicine explain seborrheic dermatitis? Let me explain it today.

Seborrheic dermatitis

Seborrheic Dermatitis Definition

What is seborrheic dermatitis? ^[1]

Seborrheic dermatitis is a chronic skin inflammation that mostly occurs in areas where the sebaceous glands are abundant. It usually spreads downward from the head. The typical damage is dark yellow red papules or patches, the edges are clear, and the surface is covered with greasy scales or palate Skin, with varying degrees of itching. The etiology of seborrheic dermatitis is not clear. At present, some researchers believe that seborrheic dermatitis is caused by the abnormal flora of the skin surface and the growth of P. ovale on the basis of seborrhea. Other factors such as heredity, mental stress, diet structure, chemical irritation, shampooing, irregular life, B vitamin deficiency, and alcohol addiction are all related to the occurrence and development of the disease. ^[2]

Typical symptoms of seborrheic dermatitis

1. Seborrheic dermatitis is common in young people and adult patients with relatively strong secretion of sebaceous glands.

2. Seborrheic dermatitis is more common in areas where sebaceous glands are abundantly distributed. It occurs on the basis of seborrhea and often spreads downward from the head. Film, clear boundaries, symmetrical distribution, conscious itching, chronic passing, easy to relapse.

3. Damage tends to be brown or yellowish-red patches with clear borders and greasy scales or scabs.

Key points for diagnosis of seborrheic dermatitis

First, the typical skin lesions are yellow-red spots, patches or maculopapular rashes, and the surface is covered with greasy scales, which may exudate in severe cases; or gray-white pityriasis scales on dry red spots.

Second, the rash occurs in the scalp, eyebrows, eyelids, nose and sides, behind the ears, neck, fore chest and upper back shoulder area, axillary, groin, umbilical fossa and other areas rich in sebaceous glands.

Third, the subjective symptoms are pruritus of varying degrees.

Fourth, infantile seborrheic dermatitis often occurs in the first month after birth, and the skin lesions are mostly in the scalp, forehead, eyebrows and cheeks. It is an exudative erythema with thick yellow greasy scales.

Seborrheic Dermatitis Treatment

General treatment for seborrheic dermatitis

Limit polysaccharides, fatty diets, avoid irritating foods, avoid scratching, and regular living.

Local treatment for seborrheic dermatitis

It is mainly fat removal, sterilization, anti-inflammatory and antipruritic.

(1) Cooper's lotion (compound sulfur lotion), for external use once a night; or 5% sulfur ointment for external use; or sulfur soft soap for external use, 2 to 3 times per week.

(2) Application of antifungal preparations: such as 3% clotrimazole cream, 2% miconazole cream, Lenovo benzylazole cream, 2% Kangte cream (including ketoconazole), etc .; but note that such drugs may have Skin is irritating or sensitising. C) Vitamin B6 cream, skin cream, vitamin E cream, etc., can be selected in rotation, one to three times a day.

(IV) Application of corticosteroids: It can be used when the rash is severe and itching is severe, such as 1% light cortisone cream, triamcinolone cream, dihanmatsu ointment, etc., choose one, daily Topical application 1 to 3 times. Note that the thin and tender parts of the skin should not be applied for a long time, so as to avoid side effects such as acne, telangiectasias, skin atrophy, and pigment changes.

Systemic treatment for seborrheic dermatitis

(1) Compound vitamin B, 2 tablets, orally 3 times a day; vitamin B6, 10 to 20 mg, orally 3 times a day.

(2) Antihistamine drugs: chlorpheniramine, phenagen, diphenhydramine, and zismin can be selected. You can choose 1 or 2 kinds of oral to achieve itching.

(C) the application of corticosteroids: short-term application can be considered when the inflammation is obvious or the rash is extensive and other treatment methods cannot be controlled, such as prednisone 20 to 40 mg / day, divided into 2 to 3 times orally.

(IV) Antibiotic application: For severe patients or when there is significant infiltration, choose tetracycline 0.25 to 0.5, orally 3 to 4 times a day, or erythromycin 0.75 to 1 g, 3 times a day.

(5) Eat more fruits