That said, caffeine narrows your blood vessels and boosts your blood pressure. "Both of these may make the hangover worse," Brick says. If you drink coffee regularly, you might try a very small amount in the morning. Wait 30 to 60 minutes and see how you feel. "If it doesn't cause a problem for you, then keep drinking it." Coffee has many health benefits. It can reduce your risk of diabetes, stroke, and heart disease. And it can give you a jolt of energy when you need it. But if you drink it in excess, it can have the opposite effect. "There's no such thing as a healthy habit, but there are bad habits and good ones," says Brick. So if you drink coffee every day, cut back until you know how it affects you. Then you can decide what level is right for you.