I have light skin and I burn very easily! When I do my hikes, I try to get them done before 10AM if possible so I'm not out in direct light. I'm allergic to a lot of sunblocks so I try to stay out of the sun.
I am fair-haired and fair skinned so I have always had issues with burning easily and being affected by the heat when I do burn.
I have to be so careful and always need to be topping up with sunscreen to prevent myself from burning, a lot of the time as much as I do spend time out in the sun, I also tend to go either indoors or in the shade a lot more to prevent sunburn.