What are the common type I hypersensitivity diseases?

summary

Type I hypersensitivity related diseases include atopic diseases, allergic rhinitis, allergic conjunctivitis, atopic dermatitis and allergic asthma (exogenous) and some urticaria, gastrointestinal food reactions and systemic allergic reactions. Although the etiology of asthma is not yet elucidated, the incidence rate of asthma has increased significantly. What are the common type I hypersensitivity diseases? Let's talk about it

What are the common type I hypersensitivity diseases?

Bronchial asthma is an extensive and reversible airway stenosis disease caused by allergen or other factors. Most of them are children and young adults with obvious family history. The patient's condition is protracted and frequent, and there are many complications. The causes of asthma are very complex. Inhaled and ingested allergens and infection, especially respiratory virus infection, are the important causes of asthma.

Atopic dermatitis is a common skin allergic disease. About 70% of the patients have a positive family history. The lesions were mainly skin rash, characterized by severe pruritus. The rash mainly occurs in the cubital fossa, popliteal fossa, neck and face. The disease can be divided into infant type, child type and adult type. Infantile atopic dermatitis, also known as infantile eczema, usually occurs in 4-6 months after birth. There are two types of lesions: exudative type and dry type.

Hay fever, also known as allergic rhinitis, is mainly caused by inhalation of plant pollen sensitization, so it has obvious seasonal and regional characteristics. The main clinical manifestations of the disease are nose, eyes and respiratory tract. It can be seen that the nasal mucosa is pale and edematous, and the conjunctiva is congested.

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The best clinical effect can be obtained by persisting in injection all the year round. Even for seasonal allergic diseases, perennial treatment is better than pre seasonal or seasonal treatment. The main allergens used for desensitization are substances that are usually not effectively avoided, such as pollen, house dust mites, fungi and insect stinging venoms.