Photo-Illustration: Intelligencer; Photos: Getty Images Last summer, my skin began to itch. I did not have a rash, or an insect bite, which meant the cause remained a mystery and lotion didn’t help me for long. I scratched my legs, my ankles, my feet, my scalp, my neck. Sometimes I found blood on my sheets after I scratched myself while falling asleep. In fact, I slept most of the time. I went to bed when I finished work in the evenings and stayed there most weekends. If I did go out in the