Headache after cardiac coronary angiography, consider that it may be caused by the contrast medium, you can drink more water to speed up the metabolism. It is also possible that the headache is caused by the increase of blood pressure after the imaging, you can take antihypertensive drugs under the guidance of the doctor. Coronary angiography is the gold standard for the diagnosis of coronary artery disease, because it needs to inject contrast agent into the coronary artery in order to visualize the blood vessels, some patients may be more sensitive to the contrast agent, and they may have a headache after the operation, but it is relatively rare, so they can drink more water to speed up their metabolism, and the headache will usually be relieved after a few hours. After coronary angiography, patients may have higher blood pressure, which can lead to headache. If the blood pressure is measured to be higher, antihypertensive drugs such as nifedipine can be taken under the guidance of the doctor, and the blood pressure can be monitored on time. If there are symptoms such as discomfort in the precordial region in daily life, it is recommended to consult a doctor in time to avoid delaying the condition.