Coronary angiography is an invasive test that involves injecting a contrast medium through a puncture in the femoral or radial artery to visualize the coronary arteries of the heart and diagnose the disease. After coronary angiography, the localization of the femoral artery puncture needs to be compressed with sandbags for at least eight hours, and the limb on the operated side needs to be restricted from activity for 24 hours to facilitate the local recovery of the wound; in the case of radial artery pathway angiography, the upper limbs need to be braked after the operation to avoid exertion of the limbs, thus preventing bleeding. In addition to the need for rest after the imaging examination, it is also necessary to observe whether there is a generalized rash, chest tightness, dyspnea and other symptoms of allergy to contrast medium; and drink more water to promote the excretion of contrast medium through the kidneys as soon as possible. It is recommended to clarify the relevant precautions after the examination and strictly implement them, and promptly consult the doctor if there is any discomfort to avoid delaying the condition.