You have to take regular bath with lukewarm water and drink plenty of water at the same time. If possible, drink lemon juice mixed with salt in hot water. And be very careful when using lotions or creams. It is better not to use any nonsense. It is best to use a good brand of Extra Virgin Olive Oil ( although 100% Virgin is not on the market). After bathing or washing hands and face, massage wet skin. This will increase the blood circulation in the skin. Which will help to keep the skin moisturized and radiant. In the cold of winter, our movement decreases , we do not take proper bath , and this also reduces the blood circulation in the body. This is how the skin becomes black. And less water is consumed. All in all, the skin is damaged. These problems can be avoided with proper care. Thanks.