Migraine - Symptoms and causes
The exact cause of migraines is unknown, although they're thought to be the result of temporary changes in the chemicals, nerves and blood vessels in the brain. Around half of all people who experience migraines also have a close relative with the condition, suggesting that genes may play a role.
One or two days before a migraine, you might notice subtle changes that warn of an upcoming migraine, including:
- Constipation
- Mood changes, from depression to euphoria
- Food cravings
- Neck stiffness
- Increased urination
- Fluid retention
- Frequent yawning