Can anybody help with bald head care?

So I took the razor to my head today and shaved my head fully bald after being told by a doctor that I had a bunch of dry skin patches up top.. I shaved it with intent to keep it bald for a while and use lotion on my scalp..

But my question is this.. How important do you guys and gals think it is to use sunblock on there anytime i am outside for a few minutes?

Updates
10 mo
I wanted to include this, I might just keep it bald from here on being it does feel more comfortable and it seems to help with my excessive sweating issues at times.
Can anybody help with bald head care?
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