I hold the umbrella where I feel the sun most directly on my skin
to reduce the amount of sun
exposure. Back in my great-grandmother's time, it was common for
many women to walk around with long sleeves and to carry parasols. Since no one makes parasols any more, I use the next best thing. I refuse to wear long, hot sleeves, though.
the itching and hot spots I'll use refrigerated aloe vera gel to cool the skin. This works even if I don't have an actual sunburn.