Fatigue, anxiety, mood changes, yawning, general feeling of an impending ‘disorder’ for hours or a day may signal the coming of a full-blown migraine attack.

Many Migraine Sufferers Can Predict Their Migraine Attack
“Migraine is for many people a lightning storm that starts hours or day similar to gathering clouds before the storm, followed by the thunderous pain of the migraine headache,” Dr. Purdy said. “The premonitory phase is well-documented but only recently have scientists considered if migraine can be treated before a patient is in full migraine attack mode.”
Symptoms are often easily recognized by patients, he said, and can include mood changes – a sense of sadness or euphoria – fatigue, problems with concentration, yawning and pallor, increasing sensitivity to light and sound and a general feeling that the migraine attack is about to begin.” In some ways, it’s very much like the PMS that many women report before their menstrual period.”
Dr. Purdy stressed that the premonition is biologic, not psychological. “Until we fully understand the neurobiology of this phenomenon, our advice to patients is to stay alert to the presence of these symptoms and slow down to allow the body to adjust to what maybe coming if a migraine occurs.”
Treatment during this phase of a migraine attack, especially with triptans, has been shown to be effective with some patients. “We found that headache prevention is possible when a triptan is administered during the premonitory period,” Dr. Werner J. Becker said. “And those that did occur appeared to be milder.” Triptans are a class of drugs that constrict blood vessels in the brain and relieve swelling that is associated with migraine pain.
Reference for: Many Migraine Sufferers Can Predict Their Migraine Attack

