My husband when he has an episode has been off & on light headed, staggers sometimes as he walks, Blood pressure fluctuates, between 130 over 78 down to 98 over 58. He is extremely tired. He has a darker than usual urine and this week has some crystals sometime when he urinates. His Eyess during this time look grayish with many blood vessels, like he has been on a weeks drunk but drinks maybe a beer a month if that. Spends a lot of time taking naps when these hit him, He is 68 years old and in very good health 95 percent of the time. He has had 3 of these episodes within the last month almost always towards the end of the week. Mostly Thursdays lasting 24-48 hours. This week it started on Wednesday.