Whether you’ve lost count of how many times you’ve dyed your hair or you’re coloring it for the first time, let’s take a moment to talk about maintenance. There’s nothing worse than getting that perfect shade at the salon — or at home, if you’re adventurous like that — only to find that your dream…

Shingles was another fear, as I had chicken pox when I was four, but we ruled that out too: “Shingles is a nerve-mediated process; it tends to be very painful, not so itchy,” Lam says. “And it has a particular [dermatomal] distribution because it’s along a nerve,” which also presents as fluid-filled blisters, rather than…