
An internet meme depicting a headache
A headache is a condition wherein the sufferer develops an uncontrollable compulsion to YELL EXPLETIVES VERY LOUDLY. If you or someone you know has a headache, be sure to stay away from teenage vampires making out, as the combination of rage and the predisposition for yelling may make the vampires cry tears of blood.
- "AN STOP flaming! if you flam it menz ur a prep or a poor! Da only reason Dumbledeor swore is cause he had a headache ok an on top of The he was mad at damn 4 having sex! PLEASE i'm not updating until i get five good revoiws."
- ―Tara Gilesbie
It also seems to be an acceptable reason for trying to kill a band member. As it was the case with James Samaro Potter, when he tried to shoot Lucian at the XBlakXtearX concert.
- "WTF! James almust shot Lucious! I said indigoally. I knew that James had really been possezzed, but I didn't want him Two know I knew. Yah I know but he had a headache he was under a lot of stress. Satan reasoned evilly. I guess that's ok."
- ―Tara Gilesbie

The effects of a headache seen in action.
A form of this condition may be developed by reading bad fanfiction, such as My Immortal. A milder form may be developed by reading descriptions of the same bad fanfiction. If there is a reason why either must be done, it is recommended that ibuprofen or aspirin be kept near the reader's computer, in case of emergency.
Other effects of this condition may include: insanity, destructive impulses, insomnia, and a strong desire for Brain Bleach.