Hi, Thanks for the query. The general causes of headache during pregnancy are : -More gap between meals leading to hypoglycemia. -Increased stress and strain. -Lack of physical activity. -Inadequate intake of water and fluids. -Medical problems like increased blood pressure etc. So, by changing lifestyle the headache can be relieved to some extent. -Take plenty of water, fruits and vegetables. -Eat smaller amount of food at more frequent intervals. -Practice deep breathing, yoga postures those are safe in pregnancy, walking etc. - Massaging over neck, shoulders, temporal regions etc can give some relief. If head ache still persists consult gynecologist once. Take care.