Headache (noun)

1. A pain in the head, typically associated with tension, hangover, or illness.
2. A source of annoyance or trouble.

Origin:

Middle english: from old english hǣd "head" + ache. compare with dutch hoofdpijn and german kopfschmerz.

Examples:

1. I have a headache and feel dizzy.
2. The noise of the construction gave her a headache.
3. The headache of dealing with the bureaucracy was almost unbearable.
4. His headache was caused by stress and lack of sleep.
5. She woke up with a headache after drinking too much wine the night before.