Well, yes, it can be. So you should pay more attention to. As we know that when you get squinting eyes, it can cause wrinkles around the eyes and forehead. So it can be ugly and annoying. And generally speaking, it can cause many problems, first, it can cause headache, the dry eyes, dark circles under your eyes, even the vision sight. Also, your eyes' muscle becomes stressed because of it. And then it can put stress on the eye muscles and the facial and scalp muscles, causing pain and headache. Anyway, just pay more attention to it. by the way, you may suffer squinting eyes from excessive sunlight exposure.