The most typical manifestation of coronary heart disease is angina pectoris, but it can also present as chest tightness, chest pain, paroxysmal tachycardia, fatigue, decreased endurance, a feeling of throat constriction, numbness in the upper limbs, and even symptoms related to the digestive tract such as upper abdominal pain, nausea, and vomiting. Many patients with coronary heart disease do not show obvious symptoms, and the onset might present as myocardial infarction or sudden death, which is very frightening. Therefore, if symptoms of coronary heart disease are noticed, it is crucial to seek medical treatment at a hospital as soon as possible. Middle-aged and elderly people should have regular physical examinations. Young people who stay up late, smoke, or are addicted to video games, among other bad habits, can also develop coronary heart disease, so it is important to be mindful of these behaviors.