I got suburn since July 2012, several times, I was very careful, using sun screens, and body lotion, I know my skin is dry. and I found one lump on my neck, another lump on my chin . they seem like above the skin, they are red and dark red, unfortunately I use baking soda to brush my teeth , it leads to irritations, my mouth corners are bad also, seems difficult to recover. these lumps sometimes itches. what should I do now?