What should I do if my facial skin has an allergic reaction to cosmetics?

When facial skin has an allergic reaction to cosmetics, the following measures should be taken: 1. Immediately discontinue use of the cosmetic product causing the allergy upon noticing symptoms such as redness, swelling, or itching. 2. Thoroughly cleanse the face with lukewarm water and a gentle facial cleanser; avoid using hot water or harsh, irritating cleansers. 3. Apply a cold compress or a cool, damp towel gently to the affected area to help reduce redness and itching. 4. Avoid using other cosmetics or skincare products during the allergic episode to prevent worsening symptoms. 5. Use mild moisturizers containing soothing ingredients such as aloe vera or glycerin to help calm the sensitive skin. 6. If allergic symptoms are severe, take antiallergic medications—such as cetirizine hydrochloride tablets or chlorpheniramine maleate tablets—under medical supervision.