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.
Seasonal allergic rhinitis is the medical term for hay fever. Rhinitis means inflammation of the inside of the nose. Some people also experience hay fever-like symptoms when exposed to other allergy-triggering substances, such as dust mites and animal fur. Read more about other types of allergic rhinitis.