dermatitis
Introduction
Introduction to dermatitis Dermatitis and eczema are often used synonymously to refer to a type of skin inflammation that represents the skin's allergic response to chemicals, proteins, bacteria, and fungi. The term eczema has no special meaning, while dermatitis has a limiting meaning. If dermatitis is used instead of eczema as a diagnostic term, it refers to a combination of dermis and epidermis, which can be acute, subacute, and chronic. The cause of dermatitis and eczema is very complicated, and it is simply divided into internal factors, external factors and other factors. The patient's allergic constitution is an important factor in the disease. It is related to heredity and can change with age and environmental changes. Neurological factors such as excessive anxiety, nervousness, emotional agitation, insomnia, and fatigue may induce or aggravate the condition. In addition, endocrine, metabolic and gastrointestinal dysfunction, infections and other diseases are also related to the onset. External causes such as: sunlight, damp heat, dryness, scratching, rubbing, cosmetics, soap, fur, fuel, rayon, etc. can induce eczema. Some foods such as fish, shrimp, eggs, etc. can also induce eczema. basic knowledge The proportion of illness: 10% Susceptible people: no special people Mode of infection: partial dermatitis is transmitted through contact Complications: folliculitis lymphitis
Cause
Dermatitis cause
Bad living habits (18%):
Such as the use of hot water to wash your face, or excessive use of soap, facial cleanser and other skin cleansers, usually do not pay attention to the protection of ultraviolet light, etc., these physical and chemical stimulation will change or damage the skin's protective barrier and vascular regulation.
Chemical stimulation (20%):
Chemical, chemical bathing agents irritating drugs, long-term stimulation of purulent secretions. Fungal, microspores, gypsum-like microspores, and hairy fungi.
Mechanical damage (18%):
Mechanical, collar abrasions, autologous contusions, scratches cause traumatic dermatitis, burns, frostbite, radiation damage, etc.
Allergies (20%):
Parasitic, such as Demodex, sputum, sputum, sputum, sputum, schistosomiasis, hookworms, etc. In addition, food allergies, drug allergies can lead to dermatitis.
Prevention
Dermatitis prevention
1. To do a good job of personal hygiene, often take a bath, while the water temperature should not be too high, 30 degrees Celsius to 40 degrees Celsius is appropriate.
2. It is necessary to change clothes and bed sheets frequently, and the body items such as mats and bedding should be cleaned and exposed frequently.
3. Keep indoor air circulation, clean environment and avoid moisture.
4. To eat properly, to ensure adequate sleep, to do some exercise to enhance physical fitness, it is best to wear long pants when going out to prevent the lower limbs from being bitten by insects.
Complication
Dermatitis complications Complications folliculitis lymphitis
The symptoms of the disease are light and heavy, and severe cases may be secondary to folliculitis and lymphitis. Persistent rubbing of the ankle or upper back can cause starchy material to deposit in the dermis, which in turn develops plaque and bryophyte-like disease.
Symptom
Symptoms of dermatitis Common symptoms Skin itching Skin has itching scratches Hook dermatitis Skin hard knot cold pain... Skin allergies Sunburn scarring skin hypertrophy scales
1. The skin appears red, swollen in the form of strips, strips or indefinite shapes. It may be covered with suede when it is exuded. When the skin is damaged, it may have erosion or ulceration, and there is local itching.
2. When the skin is covered with a large amount of inflammatory exudate and chronic dermatitis, the skin is peeled off. The skin is thickened and wrinkled.
3. In the case of fungal dermatitis, the affected part is depilated, with white powdery cruscles and red protrusions around the armpits.
4, when suffering from parasitic dermatitis, the head, back, abdomen can be seen with a red rash-like nodule, the surface has yellow suede, and there is hair removal and itching.
Examine
Dermatitis examination
1. Hematology and serological examination
Peripheral blood eosinophilia. T lymphocytes (especially Ts) are reduced. Serum IgE levels were significantly increased.
2. Skin test
Rapid allergic reactions to certain allergens (eg fungi, pollen, dander) are often positive. Intradermal test (delayed allergic reaction) with tuberculin, candida, etc., often negative or weakly positive.
3. Skin white scratch test
Use a blunt instrument to scratch the skin and white scratches on the skin (normal people are red).
Diagnosis
Dermatitis diagnosis
Infants and childhood rashes are more common in the face and extremities or elbows and armpits, with erythema, papules and exudation and other morphological damage; youth and adult lesions are lichen-like changes in the flexor or extension of the limb, rash Itching is intense and presents a chronic relapsing process. Determining whether a child has "ectopic" quality is important for the diagnosis of AD. The main basis is: history of genetic allergy (asthma, allergic rhinitis, atopic dermatitis), IgE antibody determination and some Some pharmacological tests.
