weigh in. Be weighed; also, be of a particular weight. For example, Because it was such a small plane, the passengers and their luggage had to weigh in before takeoff , or The fish weighed in at 18 pounds. [Late 1800s] See also: weigh.
Asthma and allergic diseases, such as allergic rhinitis (hay fever), food allergy, and atopic dermatitis (eczema), are common for all age groups in the United States.
Allergies manifest in a number of very specific ways, including nasal and eye symptoms, allergic asthma, eczema, hives and anaphylaxis. It is common for a person to have more than one allergic disease. The immune system in people with allergies reacts in a specific way to allergens.Allergens are those things that trigger allergic symptoms.llergic diseases and symptoms occur because of an active immune system that reacts to things that are usually harmless, such as pollens, pet dander or foods.