Silk or satin pillowcases create less friction against the skin than cotton, reducing tugging, pulling, and the formation of sleep lines. They also help prevent hair breakage.
You can, especially leftover serum or retinol on your hands after applying to your face. However, dedicated, richer body products are often more cost-effective for larger areas.
The skin around the eyes is the thinnest on the entire body, with fewer oil glands. This makes it more susceptible to dryness and shows the first signs of aging, fine lines, and crow's feet from repetitive movements like smiling and squinting.
The skin on the ears is thin and contains little subcutaneous fat, making it susceptible to sun damage, dryness, and the natural aging process, which can lead to wrinkles, creping, and even sunspots.