Nowadays, stars like to wear masks and sunglasses when they go out. In fact, they are not afraid of being recognized. Many stars go out as security guards and sometimes as staff. This kind of fighting is tantamount to announcing that they are out. There is no need to wear a hat, mask and sunglasses. After all, everyone already knows who is going out. In fact, they wear masks and sunglasses because they are afraid that fans will take pictures, because there is still a big gap between face value and reality. Almost all the photos of the stars on the screen are processed or taken from a better angle.
Most of the stars we see on the screen are well dressed, and most of them sometimes go out in disheveled clothes. If they are seen by fans and don't match the screen image, that's bad. It is not good to be photographed by fans. Very casual, unintentional, unprepared. Pose must look good after preparation, but it may not look good. When you meet fans, you will definitely take photos with your mobile phone. Sometimes the bad-looking photos will affect the image.
Of course, part of the reason is to protect the skin, prevent dust, smog and sun. It is normal for a public figure like a star to pay great attention to health and minimize the harm of the environment to the body. However, the main reason is to protect your image. Every star who appears in front of the camera is carefully dressed by stylists and makeup artists in order to leave a good image in front of the public. Sometimes I go out for a stroll, have a meal, get recognized without dressing up, take a photo and upload it online. Your accumulated popularity is destroyed because of styling problems, so it's not worth the loss. Just wear a mask.