Allergy to Timothy Grass

grass image by Brett Bouwer from

Timothy grass is one of the most prevalent types of grasses in the world, and timothy grass allergy is also common. An allergy to timothy grass may not be avoidable, but its symptoms can be treated with medication. The severity of the allergy depends on the season and the area in which you live.


Timothy grass is originally from Europe, Asia and North Africa. It is used for animals, and is often dried and turned into a source of hay. Immuno CAP reports that timothy grass is prevalent in virtually every part of the United States, but grows most effectively in cool, humid climates.


Timothy grass pollen is exerted from its flowers. Different proteins are present in the pollen during certain times of year. Thus, you may be sensitive to one protein over another. An allergy test will confirm which proteins you are sensitive to. Timothy grass allergy can cause hay fever and allergic asthma. Symptoms may include runny nose, sinus congestion, itchy eyes, wheezing, coughing and chest tightness or pain.

Time Frame

Symptoms depend on the location in which you live. Generally, the flowers of timothy grass grow during the summertime. Pollination of the flowers can occur during the late summer or fall. Pollen is carried by the wind, which can last well into late fall, when you may feel allergy symptoms. The American Academy of Allergy, Astham and Immunology (AAAAI) reports the pollen from grasses such as timothy grass is more prevalent on hot and windy days, as opposed to cold, wet ones.


Allergies to timothy grass are most prevalent during the fall, but can vary on a daily basis. Therefore, it is vital you check local pollen counts before arranging outdoor activities. Sources such as weather websites, your local news station and newspaper report pollen counts of grasses, trees and weeds every day to help allergy sufferers plan accordingly. Pollen counts are measured through air samples.


Timothy grass pollen may not always be avoided, especially if your job requires outdoor exposure. Over-the-counter medications antihistamines such as Zyrtec can help prevent symptoms and can be taken daily. If over-the-counter medications do not help, see you doctor for a prescription.