What Is The Treatment For Redness And Sun Burns On The Face?

This weekend I was in the sun for most of the day because I was on a boat. The next day, I noticed that my face was pretty red because of a mild sun burn. However, the next day after I woke up to see my forehead between my eyebrows and the top of my nose swollen. I thought it would go away and I put moisturizer on it too. However, when I woke up today, those areas were still swollen and it seems like the swelling is not going down. What should I do?