Absolutely remove all make-up before bed.

Glow

Because skin repairs itself at night, leaving on cosmetics can be detrimental to its health by clogging pores and not allowing it to breathe. This build-up of make-up and dead skin cells can cause uneven skin tone, dryness, redness, acne and even deepening of wrinkles all from not washing up before bed.

Source: The Doctors TV