Hello! Thank you for asking on HCM! You should know that the headache seem to be caused by high blood pressure. But, I would like to know what have been your mean blood pressure values before. Anyway, I would recommend consulting with your attending physician and some tests to exclude other possible causes of secondary hypertension: - a chest X ray study - complete blood count for anemia - thyroid hormone levels for thyroid dysfunction - blood electrolytes for electrolyte imbalance - kidney and liver function tests - fasting glucose. If all these tests result normal, you should discuss with your doctor on the possibility of making some changes to your actual anti-hypertensive therapy (increase the doses or add new drugs), in order to have a better control of your blood pressure values. Hope to have been helpful! Wishing good health, Dr. Iliri