The most common clinical cause of sudden panic and shortness of breath is arrhythmia due to coronary artery disease. Such arrhythmias can be atrial premature beats, ventricular premature beats, supraventricular tachycardia, or even ventricular tachycardia and atrial fibrillation, and patients can present with chest tightness and chest pain. In addition, a sudden rise in blood pressure causes hypertensive heart disease, which is complicated by arrhythmias and decreased cardiac function, and patients can also present with panic, shortness of breath, and even swelling of the lower extremities. Young patients without underlying heart disease who suddenly develop panic, chest tightness and shortness of breath may have premature beats, such as premature ventricular beats or supraventricular beats, in which case they need to go to the hospital for electrocardiogram, ambulatory electrocardiogram and cardiac ultrasound to clarify. Some patients may have abnormal thyroid function, such as hypothyroidism or hyperthyroidism. In particular, patients with hyperthyroidism develop hypermetabolic syndrome and may have symptoms such as panic, shortness of breath, sweating and finger tremors, etc. These patients may not be aware of the thyroid function, so it is recommended that patients go for thyroid function to rule out symptoms caused by abnormal thyroid function. Some patients with cervical spondylosis may also experience panic and shortness of breath. The onset of these patients is related to body position and cervical spine activities, and is also often accompanied by dizziness, nausea, shoulder pain, and even numbness of the fingers, which are relatively easy to identify.