Hello Puja, Welcome to healthcare magic. Darkening of face and neck in Indian skin is mainly due to delayed tanning from sun exposure. You need to use a good, broad spectrum sunscreen ( covering both UV-A and UV-B rays) every 4 hours even while indoors or on cloudy days. You could use a cream containing kojic acid, arbutin, liquorice and niacinamide at bedtime. You could get glycoloic acid based peels done by a dermatologist. Oral glutathione capsules are emerging as a new promising treatment to lighten complexion. You could discuss with your dermatologist if it will benefit you. Have a healthy diet rich in antioxidants. Hope this helps you. Take care.