The simplest form of treatment for allergies is avoidance of the allergen sources. If this cannot be done, medications can be used.
Allergy treatments are usually given in the form of over-the-counter or prescription medications. Antihistamines prevent the reaction caused by the release of histamine and reduce symptoms. Montelukast is a leukotriene inhibitor (leukotrienes are chemicals your body releases when you breathe in an allergen). Nasal steroid sprays and nasal saline keep the nasal passages clean and moist and reduce inflammation.
Allergies can also be treated with allergy shots (subcutaneous immunotherapy, or SCIT) and allergy drops under the tongue (sublingual immunotherapy, or SLIT). Immunotherapy works to help your body get used to allergens, the things that trigger an allergic reaction. Immunotherapy is the process of desensitizing the body by gradually introducing it to the allergy causing dusts, molds, and pollens. Over time, the concentration of these allergens is increased until the immune system learns to ignore them. As the immune system learns to tolerate these allergens, it will stop overreacting to them and the allergies will start to go away.