The point of being in a tanning bed is to expose your skin to UV rays, so that you will tan. However, if you are concerned about the effects of UV on your face, you can wear sunscreen on your face in a tanning bed. This will help protect your skin from damage. Be aware, though, that wearing sunscreen will stop you from tanning. You should therefore only put sunscreen on parts of your body that you don’t want to tan, e.g. areas where you are already tanned.