IPA: /ˌfɒlɪkjuˈlaɪtɪs/
KK: /fɑːlɪˈkjuːlaɪtɪs/
A condition where one or more hair follicles become inflamed, often resulting in red bumps or sores on the skin.
After spending too much time in the sun, she developed folliculitis on her arms.
Folliculitis is formed from "folliculus" (from Latin, meaning small sac or pouch) and "-itis" (from Greek, meaning inflammation). The word describes the inflammation of hair follicles, which are small sacs in the skin.
Think of 'small sac' ('folliculus') where hair grows, and when it becomes inflamed, that's what folliculitis means.