Computers can give headaches - so can not eating regularly. Make sure you eat properly. (that's why in Britain & Australia there is 'Morning Tea' at about 10 am, and 'Afternoon Tea' at 3pm. - usually Tea/Coffee & a cookie or two). in between Breakfast, Lunch & Dinner. At least, that's what I was always taught. I still do it and only get a headache if I get busy and miss having it.