How to find allergens for skin allergies?

Written by Zhu Zhu

Dermatology

Updated on September 15, 2024

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When skin allergies occur, the allergen is the root cause of the condition. Therefore, it’s essential to promptly identify the allergen. To find the allergen, it is recommended to conduct several tests such as patch tests, allergen screening, trichophytin tests, as well as provocation tests and slide compression diagnostic methods. Regardless of the method used, the approach varies from one individual to another.

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How to test for allergens in allergic asthma

Allergic asthma is a subtype of bronchial asthma. As the name suggests, allergic asthma refers to asthma symptoms that are related to contact with external allergens, such as dust, pollen, dust mites, pet dander, etc. When these substances are inhaled into the trachea, they can trigger asthma symptoms. Clinically, when testing which substances a patient is allergic to, it is called allergen testing. Common methods include blood tests and skin prick tests, which can be combined for comparison to identify the allergens.

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Mite allergy symptoms

Dust mites are tiny animals that are generally invisible to the naked eye and can only be seen under a microscope. If a dust mite allergy occurs, it can cause many skin symptoms, such as acne, itching, pigmentation, or erythema, severely affecting the patient's quality of life and appearance. Therefore, if a dust mite allergy is present, it is important to pay attention to personal hygiene and skin cleanliness, and maintain ventilation in the house. Treatment can include the use of anti-allergy medications.

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Written by Li Rui

Otolaryngology

45sec

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How to identify allergens in allergic rhinitis

Allergic rhinitis is a relatively common otolaryngological disease. The main cause is the body's immune response triggered by contact with allergens, leading to an imbalance in the immune status and causing a series of clinical symptoms. Therefore, in terms of treatment, it is first necessary to identify the specific types of allergens. Currently, there are two methods for allergen testing. The first method is ex vivo allergen screening, which involves blood tests. The second method is the skin prick test to identify specific allergens. Both methods are commonly used at present, and generally, choosing one of them is sufficient. However, a subset of patients may need a combination of both tests for a comprehensive assessment.

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Written by Yuan Qing

Pulmonology

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When is the best time to check for allergens in allergic asthma?

The best time to check for allergens in allergic asthma is still during an asthma attack. At this time, due to the body's strong immune response to external allergens, also referred to as a hypersensitive reaction, checking for allergens can likely yield some positive results. However, there are many methods for screening allergens, such as drawing blood to check for IgE antibodies, or using skin prick tests to assess reactions to different allergens. However, if it is during the acute phase of an asthma attack, it is recommended to use the blood drawing method, which is relatively safer. Using skin prick tests might exacerbate the patient's allergic reaction, and may even lead to an acute asthma attack, or severe asthmatic conditions. Therefore, there are significant considerations to be made when choosing different methods for allergen testing.

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Written by Wang Xiang Li

Emergency Medicine

54sec

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Symptoms of alcohol allergy shock

Patients with an allergy to alcohol can experience allergic shock, exhibiting symptoms like chest tightness, palpitations, a sensation of throat blockage, breathing difficulties, and a flushed face. Additional symptoms include dry mouth, dizziness, blurred vision, numbness in the face and limbs, and circulatory system failure, indicated by chills, cold sweats, cyanosis, restlessness, a weak pulse, and even a drop in blood pressure. Some patients may also experience loss of consciousness, coma, convulsions, and incontinence. Due to the alcohol allergy, patients may show allergic reactions like skin itching, hives, or other rashes. A minority of patients may also have abdominal pain, diarrhea, nausea, vomiting, sneezing, and fever.