It is generally when moderate mitral stenosis occurs clinically that patients begin to show symptoms, which can include dyspnea, hemoptysis, and other symptoms, as follows: 1. Dyspnea: The earliest and most common symptom that appears is dyspnea. Patients with mitral stenosis often experience dyspnea in the presence of triggers such as exercise, mental stress, infection, and atrial fibrillation. If the stenosis is aggravated, the patient may also experience dyspnea at rest, or even telescopic breathing, paroxysmal episodes of dyspnea at night, or acute pulmonary edema in severe cases.2. Hemoptysis: In addition to the most common symptoms of dyspnea, hemoptysis, sudden hemoptysis of large amounts of blood, is a symptom that can occur in patients with severe mitral stenosis, and may be the earliest symptom in this group of patients.3, Other symptoms: In addition to dyspnea and hemoptysis, other common symptoms include coughing, which is also more common, and hoarseness, which is hoarseness of voice, and this symptom is also more common.