Glad to find at least someone here is careful about what they eat. Although veganism is good, make sure you are getting all nutrients that you need, esp minerals like Magnesium and Zinc.
Now to your husband's issue, not too sure how old he is but headache period is usually between 25-55 years so unless he falls in this range, there is no defined age for headache.
Honestly, I am not very clear on his symptoms. You need to be more specific in terms of migraine symptoms, if they are migraine symptoms at all. Have you guys done annual physical and blood work? How do your cholesterol and other numbers look like? How is your overall health and lifestyle (active or sedentary etc) What kind of pain does he get, like throbbing, stabbing? Where does he get this pain? How often does he get it? What medication tried? which helped and which did not? Please explain step-by-step and may be someone can chip in.
Meanwhile, find a headache center in your area (not just a neurologist) and schedule an appointment.
Diagnosed March 2007 with left sided UC at the age of 30.
Colazal 9 daily, Imuran, 200mg daily, Vit. B12, 1mg, Multivitamin, 1 tablet daily, Fish oil 2400mg daily, Vit D 2000 IU daily.
Verapamil 320mg for migraine, Migraine episode now at least 4X a month,
Nabumetone 750mg as an abortive, so far so good with GI side effects.