Detailed answer

When the body is dehydrated, it tries to conserve water and as a result, fluid retention occurs in certain areas, including under the eyes. This can make the veins and blood vessels under the eyes more prominent, leading to dark circles and puffiness. Dehydration also reduces skin elasticity and can make the skin appear dull and dry, accentuating the appearance of under-eye bags. Additionally, dehydration can cause overall skin dryness and make fine lines and wrinkles more noticeable, further contributing to the appearance of aging and tiredness around the eyes. To improve the appearance of dark circles and under-eye bags, it is important to stay hydrated by drinking enough water, using a hydrating eye cream, getting enough sleep, and avoiding excessive salt intake.