Seborrheic dermatitis of the head
Introduction
Introduction to seborrheic dermatitis Sebaceous seborrheic dermatitis refers to the scalp that begins with a mild flushing patch with grayish white scaly scales, mild itching, rash spread, and greasy scaly map patches. Since the head is where the sebaceous glands are distributed, the sebaceous glands secreted by the skin are a normal physiological function. However, if the sebaceous glands secrete excessively, the sebum is excreted too much and accumulates on the skin, and chronic skin inflammation occurs at the accumulation. The head seborrheic dermatitis is a white scaly plaque with mica-like scalp, which is diffusely large. If the stars are scattered on the scalp or hairline, the scales are dropped by hand. basic knowledge The proportion of illness: 0.005%-0.008% Susceptible population: people with strong sebum secretion Mode of infection: non-infectious Complications: Acne, dermatitis, rosacea
Cause
Causes of seborrheic dermatitis in the head
1. Inflammation causes the normal flora (such as Pityrosporum) that is already present on the skin to multiply and invade the skin.
2. A large amount of sebum is decomposed by free fatty acids to stimulate the skin through the action of P. acnes.
3, excessive mental stress, eating habits, vitamin B deficiency, alcohol, etc., can also cause seborrheic dermatitis.
Prevention
Head seborrheic dermatitis prevention
In life, you should pay attention to regulating diet, eating more vegetables, limiting the diet of polysaccharides and polysaccharides, avoiding spicy foods such as spicy alcohol, tobacco and alcohol, avoiding excessive mental stress and partial scratching, regular life and adequate sleep.
Foods rich in vitamins A, B2, B6, and E should be eaten, and vitamin A, B2, and B6 may regulate and inhibit the secretion of fat. Vitamin E has the effect of promoting blood circulation of the skin and improving the function of sebaceous glands. Foods rich in the above vitamins include animal liver, carrot, pumpkin, potato, cabbage, sesame oil, rapeseed oil and the like.
Complication
Complications of seborrheic dermatitis in the head Complications acne dermatitis rosacea
Seborrheic dermatitis has a long course of disease, light and heavy, and can be followed by seborrheic alopecia, hemorrhoids and rosacea.
1, seborrheic alopecia
Its disease is related to heredity, male hormone, and seborrhea. Symptoms are excessive oil secretion from the scalp and a greasy hair. Excessive excess of fat on the scalp of the patient, causing the scalp to be greasy and damp, plus dust and dander mixed. It is dirty and does not wash your hair for a few days, and it smells bad, especially when the temperature is high; sometimes it is accompanied by scalp itching inflammation. Mainly due to the dampness of the scalp, bacterial infection caused by seborrheic dermatitis.
2, acne
Its incidence is mainly related to sex hormone levels, sebaceous gland secretion, Propionibacterium acnes proliferation, keratinization abnormalities of hair follicle sebaceous gland ducts and inflammation.
3, rosacea
It is a chronic inflammatory disease that occurs in the middle of the face. A variety of factors may induce or aggravate the disease, including local vasomotor dysfunction, hair follicles and local recurrent infections, using spicy food, drinking, hot and cold stimulation, mental stress, emotional agitation, endocrine dysfunction and so on. In recent years, the relationship between Helicobacter pylori infection and immune factors and the disease has begun to attract attention.
Symptom
Head seborrheic dermatitis symptoms common symptoms dandruff more baby scalp with yellow knot scalp itch babies scalp blood stasis
1, the typical skin lesions are yellow-red spots, patches or maculopapular rash, the surface is covered with greasy scales, accompanied by exudate in severe cases; or dry erythema with gray-white squama-like scales.
2, occurs in the scalp, eyebrows, eyelids, nose and sides, behind the ear, neck, can be developed to the chest and upper back scapula, axillary, groin, umbilical fossa and other sebaceous glands are more abundant.
3, the symptoms are different degrees of itching.
4, infant seborrheic dermatitis often occurs in the first month after birth, skin lesions in the scalp, forehead, eyebrows and cheeks, exudative erythema, with thick yellow greasy sputum.
Examine
Examination of seborrheic dermatitis in the head
Laboratory inspection
The examination required for head seborrheic dermatitis is firstly a routine examination of the head skin, followed by microbiological examination of the secretions, and histopathological examination for further diagnosis.
Diagnosis
Diagnosis and differentiation of seborrheic dermatitis in the head
1, dry type
Patients with seborrheic dermatitis have gray-white squamous scales on their heads, which are very itchy. In severe cases, they can damage hair follicles and cause hair loss.
2, wet type
Mostly for papules, blisters, sputum can produce erosion, exudation, and formed into yellow suede, and some with complications such as head folliculitis, often itching, unbearable, slow course, repeated attacks.
Through years of clinical research, Chinese medicine believes that the occurrence of dry seborrheic dermatitis and kidney yin deficiency, smoldering, or lung and blood heat, the heat can not be dredged, resulting in local metabolism and blood microcirculation disorders. It is followed by symptoms of rash, papules or patches and greasy scales.
