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