These substances are called allergens, and may be inhaled, swallowed, or come in contact with the skin. Allergic reactions are triggered by the immune system. It mistakenly responds to allergens similar to harmful bacteria. Allergy symptoms often mimic those of other diseases. This sometimes makes them difficult to diagnose.
Most allergy symptoms are mild, but they can occasionally cause serious illness.
Pollen, mold, animal dander, and dust are among the most common allergens. Pollen levels are generally highest on warm, dry, breezy days and lowest when it's rainy, chilly, or damp. Treatment for these allergies can include medications such as antihistamines, decongestants, steroids, and allergy shots. This is when pollen levels are highest. Shower and shampoo your hair after being outdoors for extended periods of time.