Signs of Migraine That Don't Include the Usual Headaches
Difficulty Concentrating As A Migraine Symptom

Some migraine patients have complaints that they lack focus, which can be a present symptom whether or not the migraine causes head pain. When a migraine does not have the signs of a headache, they are referred to as a silent migraine. In a study of one hundred and forty-one patients that suffer from migraines, eighty-four complained that lack of concentration was a warning sign of an oncoming migraine. In a study done in 2005, ninety percent of the patients found that they had trouble concentrating. Those who experience this symptom explain it as having a hard time paying attention and staying focused, as well as troubled or slowed thinking.