Detailed answer

Cold weather has a negative impact on sallow skin because it can further dry out the skin, leading to a dull and lackluster complexion. The low temperature causes a decrease in the production of sebum, the skin's natural oil, which results in dryness. Additionally, cold weather can constrict blood vessels, reducing blood flow to the skin and making it appear pale and sallow. To combat these effects, it is important to moisturize regularly, use a hydrating cleanser, and protect the skin with a barrier cream or moisturizer during colder months.