What should I do if white patches appear on my face?

White patches appearing on the face may indicate various skin conditions, such as vitiligo, psoriasis, white moles, or pityriasis alba. The management of each condition may differ: 1. Increase nutrient intake: If the cause is poor nutrition, improving the diet with foods rich in vitamins and minerals may help. 2. Moisturize: If dry skin is the cause, using moisturizing creams can help improve the condition. 3. For vitiligo, topical corticosteroid creams such as mometasone furoate cream or halometasone cream may be applied under a doctor's guidance, or treatments such as ultraviolet light therapy or 308-nm excimer laser therapy may be used. 4. For pityriasis alba, urea ointment or chlortetracycline ointment may be applied under medical supervision, along with vitamin and trace element supplementation, and protection from sun exposure. 5. For tinea versicolor, antifungal creams such as clotrimazole cream or nateftine hydrochloride ointment may be applied under a doctor's advice. 6. Physical therapy: For example, laser therapy may be used for depigmenting disorders such as vitiligo. 7. Avoid triggers: If the cause is an allergic reaction to cosmetics or skincare products, discontinue use of the product and use antiallergy medications to relieve symptoms. If the white patches persist or symptoms worsen, prompt medical consultation is recommended.