Well, yes, what your mother said is right. Drinking alcohol can lead to subconjunctival hemorrhage. As we know that subconjunctival hemorrhage is similar to an ordinary bruise on the skin and it's like a bruise of the eye. It usually appears as a single, concentrated spot of red, or many scattered red splotches, on the white of the eye. And they can be caused by high blood pressure. So when you have too much drinking, it can make your blood pressure become high. In that way, it can definitely lead to subconjunctival hemorrhage. So just quit drinking. Also, you should know that some injury to the eyes can lead to them. In addition, sometimes they occur after a bout of coughing or vomiting. Anyway, just avoid these things. And have a good rest.