contact blepharitis
Introduction
Introduction to contact dermatitis Contact dermatitis is an allergic reaction of the eyelid skin to a certain allergen, or it can be part of the skin irritation of the head and face. Contacting molting is an allergic reaction of the eyelid skin to a certain allergen, or it is part of the skin irritation of the head and face. Contact with allergens. Common allergens are antibiotics for topical application of the eye, local anesthetics, atropine, pilocarpine, iodine, mercury and other preparations. Many chemicals that come into contact with the eyelids, such as cosmetic dyes, hair dyes, enamel plasters, and spectacle frames, may also be allergens. Systemic exposure to certain allergenic substances or certain foods can also occur. Sometimes it occurs only after exposure to the allergen for a period of time, such as long-term application of atropine or pilocarpine. Contact dermatitis is a seasonal recurrent episode of contact dermatitis caused by pollen, which occurs in spring and autumn, and is more common in women. The performance is seasonal, and the rash is mostly limited to the face and neck. It is characterized by mild erythema and edema. It is slightly bulged or accompanied by a few red rashes of rice size. Some manifest as erythema around the eyes or neck, and the edema is not obvious. Some can also be eczema-like changes, mild mossy rashes, and ecdysis-like scales. It is often accompanied by itching, which occurs repeatedly every year and can resolve on its own. The disease is sometimes accompanied by allergic rhinitis or other "ectopic" history. basic knowledge The proportion of illness: 0.002% Susceptible people: more common in women Mode of infection: non-infectious Complications: conjunctival hyperemia
Cause
Causes of contact dermatitis
Common allergens are antibiotics for topical application of the eye, local anesthetics, atropine, pilocarpine, iodine, mercury and other preparations. Many chemicals that come into contact with the eyelids, such as cosmetic fuels, hair dyes, plasters and eye frames, may also be allergens. Systemic exposure to certain allergenic substances or certain foods can also occur. Sometimes it occurs only after exposure to the sensitizer for a period of time, such as long-term use of atropine or pilocarpine eye drops.
Prevention
Contact dermatitis prevention
1. Remove the cause and immediately stop contact and use of the pathogen.
2, cold phase with normal saline or 3% boric acid solution cold wet compress.
3, topical application of corticosteroid drugs such as 0.025% dexamethasone and prednisone eye ointment, but should not be bandaged.
4, the whole body taking vitamin drugs and antihistamines such as chlorpheniramine, etc., severe oral steroid drugs.
5. If the drug is allergic, all drugs should be suspended.
6. Wear a dark flat mirror to reduce light irritation and symptoms.
7, autonomy has no effect to hospital treatment.
Complication
Contact dermatitis complications Conjunctival congestion
Such as secondary infection can occur with thick blister and purulent sputum, may be associated with systemic symptoms such as local lymphadenopathy and fever.
Symptom
Contact dermatitis symptoms Common symptoms Papular pustules conjunctival congestion eyelids have obvious ...
The patient felt itch and burning sensation. In acute cases, the eyelids are suddenly red and swollen, and the skin has papules, blisters or pus, accompanied by yellowish viscous exudate. Soon it was smashed and crusted. Sometimes the conjunctiva is hypertrophied and congested. In the subacute, the symptoms occur slowly, but often do not heal. Chronic, can be converted from acute or subacute eczema, sputum skin is thick and rough, the surface is scaly off, mossy.
Examine
Contact dermatitis examination
Contact dermatitis may be like other types of dermatitis. A typical history of skin changes and exposure can help with the diagnosis, but a diagnosis requires a detailed history and patch test. The patient's occupation, hobbies, housework, vacation, wear, topical medicine, cosmetics and spouse activities must be considered. It is helpful to understand the characteristics of local allergens or irritants and the typical distribution of skin lesions. The site of initial damage is of great value in determining the cause.
Diagnosis
Diagnosis and differentiation of contact dermatitis
diagnosis
According to the history of exposure to allergens, and the clinical manifestations of the eyelid skin, it can be diagnosed.
Differential diagnosis
It is differentiated from eyelid eczema.
