Allergies

An allergy is an [unusually:often] strong reaction to a substance. Many things can cause allergies. The most common cause is pollen. Trees usually produce pollen in the spring, grasses in the summer, and weeds in the [fall:winter] as part of their reproductive process. Other causes include organisms such as dust mites and molds. Chemicals, plants and [dead:bad] skin particles from dogs and cats can also cause allergic reactions. So can insect stings and some foods. The most common kind of allergic reaction is itchy, watery [eyes:mouth] , and a blocked or watery nose. Allergies can also [cause:issue] red, itchy skin. Some reactions can be life-threatening -- for example, when breathing passages become blocked.