Experts stress the need for at least seven hours of sleep, yet many fall short due to stress, insomnia, or lifestyle factors. A Simba survey, analyzed with AI, revealed how poor rest affects the body. “Higher cortisol levels from poor sleep may worsen skin conditions such as eczema and psoriasis,” while reduced blood flow can leave skin dull and tired.

The study found 24% reported skin sensitivity, 16% eczema, 7% psoriasis, and 10% dull complexion. About 15% noticed brittle nails, suggesting sleep loss disrupts repair processes.

Weight issues were also noted: 26% of poor sleepers were overweight, and 32% reported bloating. Experts explain disrupted rest affects ghrelin and leptin, hormones that “increase appetite and cravings, particularly for high-calorie foods.”

Men lacking sleep may store more abdominal fat due to lower testosterone, while women often gain fat around hips and thighs. Some also reported cold hands and feet, linked to circadian rhythm disruptions.

Research further suggests poor sleep contributes to constipation. Most adults need 7–9 hours, while children and teens require more for healthy growth.