I've been getting them everyday four about four days now. They aren't bad, more annoying than anything. It's always behind my eyes and they make me clench my jaws. I don't really have neck pain just slight stiffness. It sounds like a tension headache but I've never gotten them day after day before. I'm always under stress so I don't think I'd suddenly get headaches from it when I've never had them from stress in the past. My vison is fine so I don't know what the deal is.