Hi currently on holiday with little one 11 months He has 5 start uva uvb suncream on and a uv suit, uv tent and umbrella. Suncream reapplied every hour or so. His arms seem to be going red no matter what I do😩he was in The sun this morning for 15 mins walking to shop but other than that he's been in the shade. Anyone any ideas?surely it can't be sunburn🥺