However, people with frequent episodic headaches are at a higher risk of developing chronic headaches.

CNN: Tension headache

He said many patients with chronic headaches often conventional medicines often did not work, so many overused the drugs.

BBC: Poison 'prevents headaches'

Still nimble, Jones doesn't experience chronic headaches or have memory trouble.

CNN: Former NFL player wants brain studied

Some people living near compressor stations in other parts of the country have reported chronic sore throats, headaches, nosebleeds and other ailments.

WSJ: NY town of 9/11 workers wages gas pipeline fight

That can lead to headaches, restricted breathing and chronic pain.

FORBES: What Banking and Bra Shopping Have in Common

If your headaches occur 15 or more days a month for at least three months, they're considered chronic.

CNN: Tension headache