I went through chickenpox, when I was 20. For me, it wasn't a hard time, but the hospital's company medical officer had a hard time, because, naturally, I've been working there with patients until I detected the disease.
Today I learned that, when you sit down in a forest, huge red ants can try to get into your pants and, when there, naturally will bite you. My bum hurt for at least 30 minutes! But before and afterwards, I haven't seen one red ant, at all!