Getting enough sleep is important, for example, because this is the time when skin works especially hard at repairing itself. Lack of i leaves skin looking dull. If you're suffering from insomnia, the chances are that stress is a significant factor. Whereas happiness make skin glow, stress makes skin show the worst side of its nature. Spots, pimples, eczema, blotchiness and flakiness: these are just some of the stress symptoms you may see in your skin.