When you have pink eye, you should not use mascara. Actually, Mascaras have a short shelf time after their first use, so you cannot use them for too long. After a long time of use, a large amount of bacteria and viruses may be accumulated on the brush of the mascara. This may cause eye infection and deteriorate your pink eye. The first thing you should do as soon as you have the sign of pink eye is to throw away your old cosmetics that directly touch eyes such as mascara, eye shadow and eyeliner. After your eyes have recovered, you should not use mascara or other eye cosmetics for more than 3 months to prevent potential eye problems. There are also some people who just wash and disinfect the brush of the mascara and use it again after the recovery. However, this is not recommended for the sake of safety.