Research shows that headaches affect tens of millions of Americans every year. It’s estimated that 12 percent of those millions suffer from severe migraines. Although headaches can be annoying and painful, the worst part about having one is not knowing what could have caused it. We’ve compiled a list of the top 10 causes of headaches.

Take note

The number of headaches per year can be reduced by avoiding the most common causes.

• Stress. Stress is the leading cause of headaches. To reduce stress-related headaches, you can exercise or meditate to calm your nerves and keep stress levels low.
• Eating. Your health can be affected by your eating habits. Chosen foods such as chips, chocolate, processed meats and cheeses can increase your chances of getting headaches. Headaches can be prevented by eating fresh fruits and vegetables and drinking plenty of water.
• Eye strain. Eye strain is often linked to headaches. Eye strain can be caused by prolonged eye strain or exposure to fluorescent lighting. Use an anti-glare screen if you are working on a computer. Ask your doctor for anti-glare prescriptions for your glasses.
• Sleep deprivation. A headache can be caused by sleeping less than 7 hours per night. To function properly, your body needs at least 7 hours sleep each night.
• Too much sleep. A night with less than 7 hours sleep per night can cause headaches. However, more than 11 hours sleep can lead to the same effects. Ideal is 8-10 hours of sleep each night.
• Sitting. Although it may seem strange, too much sitting can cause headaches. To loosen your muscles and prevent them from tightening up, stand at least 10 minutes per hour. This will reduce your chances of getting headaches.
• Smoke. Headaches are a major cause of smoking. This is a well-known fact, but many people don’t realize that second-hand smoke can cause headaches in those who don’t smoke.
• Loud Noise. Any kind of loud noise can cause headaches. It is also very difficult to get rid a headache if you are around loud noises.
• Hangover. A hangover can cause headaches. Aspirin, water, and time are the only ways to get rid a headache caused by a hangover.
• Side effects of medication. Most medications have side effects that cause headaches. There is no way to avoid side effects if you take the medication.