Of course, it is bad for your eyes if you leave your makeup overnight. As we all know, there are many chemical in the makeup, if you leave them over night, especially the fake eyelashes and eyeliner, which will harm your eyes. If you are lucky, your eyes will just get infected, which will recover within a few days. However, if you are not a lucky dog, your eyes will get pink eyes. What's worse, the makeup on the eyes will promote the loose of the eyelashes. Besides the eyes, there are some other side effects on our skin. You know our skin needs to breathe during the night while sleeping. We do not clean up the makeup, which will stop the breath that resulting in the lack of water of our skins around eyes and face. As a matter of the fact, no matter how late it is and how lazy you are, you should clear up the makeup considering your health of your eyes and skins.