The Real Consequences of

Sleeping in makeup may seem harmless, but dermatologists warn it can clog pores, cause acne, and irritate skin.

Makeup traps dirt and oil, disrupting your skin’s overnight repair process.The American Academy of Dermatology lists failing to wash your face before bed as a top cause of breakouts.

What Causes Clogged Pores? Do You Have Congested Skin? – Love Wellness
Premature Aging and Eye Damage

Leftover makeup creates free radicals that damage collagen, leading to wrinkles and dullness.

Eye makeup, especially mascara and eyeliner,

can cause conjunctivitis, styes, or even vision issues.

Eye Infection from Makeup: Everything You Need to Know
In one case, a woman developed “hard, black concretions” under her eyelids after years of unremoved mascara.

Ways To Remove Makeup naturally | OnlyMyHealth
Other Effects

Sleeping with mascara can make lashes dry and brittle,

while leftover foundation leaves skin dull and inflamed.