Eye doctors caution against sleeping in mascara, warning of hidden buildup under eyelids.

Leaving eye makeup on at night may seem harmless, but experts warn it can lead to irritation and long-term eye issues. Many people skip removing mascara, assuming it will wash away by morning, but optometrist Dr Jennifer Tsai explains that leftover mascara can break down into tiny particles that collect under the eyelids. These particles form deposits along the conjunctiva and upper lid, which can harden into small nodules. Over time, this buildup can scratch the cornea during blinking, causing redness, discomfort, and a gritty sensation in the eyes.

Adding to this, Dr Devaprasad G from M.C. Modi Eye Hospital explains that dried mascara flakes can easily migrate under the eyelids during sleep through natural movements like blinking or eye rubbing. Once there, they mix with tears and oils, creating sticky residues that are difficult to remove naturally. While the eyes have self-cleaning mechanisms, they are not designed to clear cosmetic debris, making proper hygiene essential.

Early signs of this issue include mild irritation, redness, watering, itching, or discomfort while blinking. If ignored, symptoms can worsen to burning, light sensitivity, blurred vision, and even recurring infections or styes. To prevent these problems, experts recommend a proper makeup removal routine using a gentle, ophthalmologist-approved remover. Applying it on a soft cotton pad, letting it dissolve the mascara, and wiping gently—without rubbing—is key. Regular and thorough cleansing of the lash line every night helps maintain eye health, prevents infections, and ensures long-term comfort.