I’ve always had dandruff trouble, but prescription shampoo and rigorous hygiene have kept it in check. Lately, it’s propagated beyond control. Skin wriggles off my scalp, down my neck, down my face, and I scrape it away with my fingertips. My scalp bleeds. The next day, I scratch at the tingle, and my nails come away with bits of dried blood and gnarled scabs. I lie in the bath, my nose just above the tepid water, and mourn my loss.