The second group of allergens comes through ingestion such as some foods, like cow's milk (or cow's milk protein) , eggs, shellfish , soybean , Wheat , sesame , Peanuts and some tree nuts, and some Medications, such as some types of antibiotics.

The third group is through skin contact and the examples include allergy to insect bites and contact with some chemicals as lotions Cosmetics, soaps , other household cleaners, and pesticides.

Atopy , which by definition is an immune disorder in some people that leads to an increase in a type of Antibodies that activate the body's immune reaction to substances that may be from outside the body or from the body itself. The diseases in this form are allergic rhinitis atopic dermatitis (eczema), and asthma.

The issue of using vinegar or alcohol in compresses

Vinegar is a vasodilator, so it may cause heat to transfer more quickly through the skin and reduce the temperature, but using it extensively over a wide area of the body has harmful toxic effects on the body , therefore. It is recommended not to use it, but some insist on using it, and here I advise against using it concentrated, as only one teaspoon of vinegar can be added to every two liters of water for compresses. This certainly reduces the vasodilation property , but we avoid its toxicity .

For alcohol. Alcohol works quickly to cool the skin through evaporation, but using it with compresses on a large area of the skin leads to alcohol poisoning as a result of its absorption from the skin and leads to significant health damage. Therefore, it is also not recommended to use it at all, and if we add it to water , it loses its rapid evaporation property and loses its function, and only its toxicity remains . Therefore, we never use alcohol.