when do allergies go away

Allergies can last anywhere from a few hours to several weeks depending on the type and severity. Mild allergic reactions like hay fever or nasal congestion may resolve within a few hours to days, especially with treatment, while some allergic reactions can take two to four weeks to fully resolve even with appropriate care. Seasonal allergies often persist for several months, corresponding to the allergen seasons (e.g., spring to fall pollen seasons), and can feel like they never completely go away if exposure continues. Allergies typically go away once the allergen exposure is removed, but chronic allergies may require ongoing management and avoidance strategies. Some allergies, especially in children, may be outgrown over time, but others can persist or change with age and immune system changes.