By the way, some six days ago I got a feeling of a kind of tingling pain on the right side of my scalp, and when I brushed my teeth I felt pain in my gum on the right side. I didn't think much of it at first, but yesterday I got blister in my scalp as well so I went to see a doctor today, and it turns out I have shingles. So now I'm on valaciclovir, the pain isn't as bad as I thought it would be though.
Be careful with shingles. My daughter got shingles in her right eye and while the shingles have "gone" it led to some secondary problems. It seems shingles never "go away" - they just wait there and can spring up again. Yes healthy lifestyle and eating and good sleep etc reduce the likelihood of repeats so that seems to be the way to go for lots of things. best of luck.