To a certain degree, wearing glasses will cause the pimples, but it will depend on where the pimples are and the material of your glasses, especially the frame of the glasses. As we all know, the pimple, also know as the acne, is a skin disease that is caused by the long-term close stuffy state, and also, the skin on our nose and both of our cheek are closely touch with our glasses. Consequently, If acne appears at nose bridge, then it may be caused by your glasses, because the glasses might press pore of nose bridge, block the blood to some extent. If so, you just need adjust your glasses. If it does not work, now you should check the glasses to know whether there are some dirty on your glasses, because if there are some things on the glasses which is allergic to your skin, then you will have the pimples. Then, you just need to clean your frame with wet tissue.