Are frequent intense aches of the head or neck that are not caused by another physical disorder.

Migraines are frequent intense aches of the head of neck that are not caused by another physical disorder. Severe pain may usually be felt on either one side or both sides of the head. Pain usually is felt in the temples. Migraine could last for hours or couple of days. 

biology is the study of life. it is the study of living organism.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.