Allergic rhinitis can be more than just an occasional nuisance. Constant sneezing, a blocked or runny nose, itchy eyes and postnasal drip can interfere with sleep, concentration and work performance while making simple daily activities uncomfortable. For many people, symptoms occur repeatedly with exposure to common environmental factors, making it hard to avoid flare-ups. Over time, chronic allergic rhinitis can cause a great deal of discomfort.

While antihistamines and nasal sprays can help manage symptoms, they often only provide temporary relief without addressing the underlying allergic response. To target the root cause and work toward longer-term improvement, allergen immunotherapy may be considered.

By gradually retraining the immune system to become less sensitive to specific allergens, immunotherapy aims to reduce symptom severity and frequency, helping individuals achieve more sustained control of their allergic rhinitis.

Allergic rhinitis is caused when the nasal passages are inflamed due to an allergic reaction. This happens when the immune system reacts to harmless substances in the environment like dust mites, pollen, mould or pet fur. In response to these substances, the nose releases histamine, which causes swelling in the nasal lining.

Symptoms of allergic rhinitis include sneezing, a blocked or runny nose, itchy nose or throat, watery or itchy eyes and postnasal drip. Some individuals may also experience a reduced sense of smell, facial pressure or fatigue due to persistent congestion and disrupted sleep.

Allergic rhinitis commonly begins in childhood, particularly in children with a family history of allergies, asthma or eczema. However, it can also first appear in adolescence or adulthood, even in individuals who previously had no noticeable allergic symptoms.

Allergen immunotherapy is a treatment that aims to modify the body’s immune response to specific allergens. Instead of simply suppressing symptoms, it works by gradually exposing the immune system to carefully measured amounts of the allergen responsible for triggering symptoms. Over time, this controlled exposure helps the body become less reactive.

As the immune system adapts, it becomes more tolerant to the allergen. This can lead to reduced inflammation in the nasal passages, fewer flare ups of allergic rhinitis and a decrease in overall symptom severity. Many patients also find that they rely less on medications such as antihistamines or nasal sprays once immunotherapy takes effect.

Allergen immunotherapy may be delivered through subcutaneous injections or sublingual tablets, depending on the type of allergen and individual suitability. The choice of method and treatment duration will be determined by the doctor based on the patient’s age, allergy profile and overall health.

You may consider allergen immunotherapy if your allergic rhinitis symptoms are persistent, moderate to severe or significantly affecting your quality of life. This includes ongoing nasal congestion, sneezing, itchy eyes or disrupted sleep despite regular use of antihistamines, nasal sprays or other prescription medications.

Immunotherapy may also be suitable if you do not want to rely on long-term medication to control symptoms. If you prefer a treatment approach that targets the underlying cause of your allergies rather than providing temporary relief, you may benefit from a consultation with an ENT specialist. Allergy evaluation and testing from a doctor can help you determine whether allergen immunotherapy is appropriate for you.