When you feel stressed, your body produces more of the hormone cortisol. Cortisol causes a part of your brain known as the hypothalamus to produce a hormone called corticotrophin-releasing hormone (CRH). CRH is thought to stimulate oil release from sebaceous glands
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around your hair follicles. Excessive oil production by these glands can clog your pores and lead to acne.

Research has found that stress caused by sleep deprivation increases signs of aging, such as fine lines, reduced elasticity, and uneven pigmentation. The loss of skin elasticity may also contribute to the formation of bags under your eyes.

Stress causes changes to the proteins in your skin and reduces its elasticity. This loss of elasticity can contribute to wrinkle formation.