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.
There are many different types of eczema. 1  Atopic dermatitis is a form of eczema related to the same immune reaction that underlies allergy and asthma (atopic disease). 2  The condition tends to be chronic. 3  Contact dermatitis results when allergens or irritants provoke skin inflammation.