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.
Indeed, there are two forms of asthma, allergic asthma and nonallergic asthma, with the allergic form being more common. Allergic asthma develops in people who have allergies, and the same substances (called allergens) that provoke their allergy symptoms also trigger their asthma symptoms.