Subcutaneous immunotherapy is a treatment method used to help people with allergies. It involves injecting small amounts of allergens, such as pollen or dust mites, under the skin. This process helps the immune system gradually become less sensitive to these allergens, reducing allergy symptoms over time. The treatment typically requires regular injections over several months or years. Patients may start with a higher dose and then move to a maintenance dose. Subcutaneous immunotherapy is considered effective for various allergies, including hay fever and insect stings, and can improve quality of life for those affected.