Although I'm sure you're finding them annoying, I can reassure you that headaches are not unusual during pregnancy. The number and frequency are a result of the hormonal changes in your body when you're pregnant. Some women have fewer headaches when they're pregnant; others have more. The most common headaches are caused by tension. Your head feels tight, almost as if you had a tight band around it. Being pregnant can make you tense because of all the changes in your life, emotional concerns, or physical stress. Avoid stressful situations whenever you can and don't place unrealistic expectations on yourself, your partner, or your pregnancy. If the sun seems to trigger your headaches, stay out of it as much as possible. Avoid taking aspirin, ibuprofen, and most other medications. If you must take something, take an aspirin substitute. Better yet, learn relaxation and massage techniques, or sit down, put your feet up, and have a cup of tea. And try to get plenty of sleep.