Acute coarctation aneurysms are extremely dangerous cardiovascular emergencies that are like time bombs buried in the human aorta, and a violent cough can cause the aneurysm to rupture and endanger the patient’s life. This condition used to be rare, but in recent years it has become more frequent, often in patients with uncontrollable and unstable hypertension and in younger hypertensive patients. If left untreated, 36% to 72% of these patients die within 48 hours of onset and 62% to 91% die within 1 week of onset. This type of disease is easily overlooked by patients, and all three patients treated started with what they thought was angina pectoris or gastroenteritis. Therefore, we remind everyone that if you have severe chest pain or abdominal pain in daily life, you must go to a regular hospital for a comprehensive examination to detect the “untimely bomb” of aortic coarctation aneurysm in advance.