Put your finger on a spot where it itches. Push in then take it away. If you see a whiter imprint of your finger, sweetie, you got a burn. You may be taking awhile for the redness to show. Or maybe your base skin coloring has enough color that the red won't show as well. I am a redhead with freckles and pale skin. So it's pretty obvious on me. I get burnt when the sun reflects off the snow. If I get sun poisoning, i get it everywhere but where the freckles are - they just keep tanning. I spent my youth burning myself trying to run the freckles together so I would finally have a tan - doesn't work that way.