Sunlight does not make pink eye worse. But when you have pink eye, your eyes will be sensitive to sunlight. The UV and UVB in the sunlight are harmful to your eyes even when your eyes are quite normal. If you have pink eye, your eyes may be vulnerable to the damage caused by sunlight but this eye problem will not get worse. So, whenever you are exposed to sunlight, you should wear sunglasses to protect your eyes from discomfort. Usually, poor hygiene and irritation are more likely to make the pink eye worse. You should keep your eyes, hands and fingers clean all the time. The environment around you and your articles of everyday use should also be clean. Above all, it is much safer for you to stay at home to avoid the condition to deteriorate.