Well, yes, mascara can cause dry eyes. Generally speaking, we can know that if you do not have the necessary balance of these three layers in your eyes, or if your eyes do not make enough tears to coat the eye, you may have dry eye. For the causes, there are many factors which can cause it, such as immune-mediated, drug-induced, chronic allergic eyelid disease. So mascara can be the cause related to dry eyes. Mascara is made of chemicals, and that can just be allergies in some degree. And then, it will just lead to dry eyes. To treat it, you can take some foods which are rich in vitamins such as the fishes and some other vegetables. Besides, if you have dry eyes, you may experience scratchiness, itching and burning on the surface of your eyes. Anyway, just stop using mascara at this period.