Detailed answer

When you have an allergic reaction, your body releases histamines which can cause blood vessels to dilate. This increased blood flow can lead to dark circles under the eyes. Additionally, allergies can cause inflammation and fluid retention, which can contribute to under-eye bags. Common allergens such as pollen, pet dander, and dust mites can trigger these allergic reactions. It is important to manage your allergies by avoiding triggers, using antihistamines if necessary, and practicing good skincare habits to help reduce the appearance of dark circles and under-eye bags.