20.10.2021

Atopic dermatitis, skin allergies

The history of the course of the disease after skin allergy testing is also extremely important. Only a medical history and a detailed description of the symptoms will help determine whether contact dermatitis causes substances and materials for which the patient suffers from allergies.

  • Patients who have ever suffered from atopic dermatitis are at increased risk for nonspecific dermatitis of the hands and irritant contact dermatitis.
  • Patients suffering from atopic dermatitis are not at risk of the disease of allergic contact dermatitis, despite the use of many topical preparations and moisturizers for chronic atopic dermatitis.
  • Patients suffering from atopic dermatitis are at a lower risk of allergic contact dermatitis caused by sumac.
  • Studies by European scientists have shown that patients suffering from atopic dermatitis are at risk of having allergic contact dermatitis caused by nickel.

In this case, all potential pathogens of allergic contact dermatitis, materials and substances with which the patient contacts frequently should be tested. A patient with allergic contact dermatitis will need a much more detailed history of the course of the disease than any patient with other dermatological diseases.

The positive result of the allergy test may indicate only the sensitivity of the human body to the substance, but not that the substance was the cause of the appearance of dermatitis.

Preclinical stage of skin disease
  • Among patients suffering from hemostatic dermatitis, there is a high risk of the disease of allergic contact dermatitis due to a reaction to materials and substances that are used to treat hemostatic dermatitis and leg ulcers. Sometimes the cause of allergic contact dermatitis becomes the drug Neomycin, which is used quite often, despite the lack of convincing documentation, indicating its effectiveness in the treatment of circulatory varicose ulcer.
  • Patients suffering from otitis media often develop an allergy to topical neomycin and topical corticosteroids.
  • People with anal pruritus and genital itching may develop sensitivity to benzocaine and other medicines used to treat chronic itching.
  • Women with sclerotic atrophic lichen often develop allergic contact dermatitis, which complicates acute chronic genital dermatosis.
Symptoms
  • In people suffering from allergic contact dermatitis, dermatitis appears (a few days after contact with the pathogen) in areas that have been in direct contact with the allergen. Certain allergens (eg, neomycin) get to a healthy area of ​​the skin in small quantities, and dermatitis can occur only one week after contact.
  • A minimum of 10 days takes the process of developing the body’s sensitivity to a new contact allergen.
  • A person who has never been allergic to soums taking root may develop mild dermatitis 2 weeks after the first contact, however, usually 1-2 days after the second and subsequent contacts, acute dermatitis develops. It should be remembered that removing sums from the skin is rather difficult, and if a person does not wash the contact area within 30 minutes after contact, allergic contact dermatitis will appear. A sign of a reaction on sums is a linear lesion on the skin.
  • If the skin lesions are linear or sufficiently clear, the external cause of the appearance of dermatitis should be considered. The sudden onset of symptoms of dermatitis immediately after contact with a material – a potential allergen indicates a cross-allergic reaction, non-specific irritant contact dermatitis to an unknown agent, or that a person has forgotten about contact with the substance.

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