Headaches are not uncommon in pregnancy. They are often caused by low blood sugar or dehydration, so make sure you’re eating small snacks every two or three hours, and getting enough to drink. They can also be triggered by stress or specific foods, so you should try hard to avoid things that you know usually give you a headache. If you do get a headache, you can apply a warm compress (such as a hot towel) to your face, eyes and temples — or try a cold compress on the back of your neck. Aromatherapy can also be helpful for headaches. Consider a lavender/chamomile blend in the evening or a spearmint/eucalyptus blend in the day time. If the headache is severe, accompanied by abdominal pain, or visual disturbances, you should call your care provider right away.