Allergies are immune system responses to substances that are typically harmless to most individuals, but trigger a reaction in those who are allergic. Common allergens include pollen, dust mites, pet dander, certain foods, and insect stings. Symptoms of allergies can range from mild, such as sneezing and itching, to severe, such as anaphylaxis, which can be life-threatening. Allergy research focuses on understanding the causes of allergies, improving diagnostic methods, developing effective treatments, and exploring potential preventive measures. This research can lead to advancements in allergy management and ultimately improve the quality of life for individuals with allergies.