Allergic diseases refer to a range of conditions that occur when the immune system overreacts to harmless substances, such as pollen, food, or pet dander. This overreaction leads to symptoms like itching, hives, swelling, and difficulty breathing. Common allergic diseases include allergic rhinitis (hay fever), asthma, food allergies, and eczema. Research in allergic diseases focuses on understanding the underlying mechanisms of these conditions, identifying triggers, developing effective treatments, and improving prevention strategies. This may involve studying the role of genetics, environmental factors, and the immune system in allergic reactions, as well as conducting clinical trials for new medications and therapies. The goal of this research is to improve the quality of life for individuals living with allergies and reduce the prevalence and severity of allergic diseases in the population.