Allergies are often worse for patients during the pollinating season. This is termed seasonal allergic rhinitis SAR. “Hay fever” really is a misnomer, but we tend to use it synonomously with SAR. SAR is caused by pollens, and the most significant in the United States is from ragweed. It begins pollinating in late August and continues until the first frost. Late springtime pollens come from the grasses, such as timothy, orchard, red top, sweet vernal, Bermuda, Johnson, and blue grass. Early springtime hay fever is most often caused by pollens of trees such as elm, maple, birch, poplar, beech, ash, oak, walnut, sycamore, cypress, hickory, pecan, cottonwood, and alder. Colorful or fragrant flowering plants rarely cause allergies because their pollens are too heavy to be airborne. For current and local allergy counts, see Pollen.com.
Indoors and out, mold spores’ ideal landing pad is one with moisture, air and organic matter to serve as food.
Dust mites love to dwell in carpeting, furnishings, bedding, radiators, air conditioners and behind and under refrigerators.
Irritants evoke inflammation via a non allergic pathway.
Other potential troubles in your home include lead paint, water woes, asbestos, and radon gas.