Symptoms that should be taken seriously 1. Chest tightness and chest pain appear and cannot be relieved within a few minutes. 2.Sudden difficulty in breathing, and gradually worsen. 3.Brief blindness or foggy appearance in one eye. 4.Abnormal sensations such as difficulty moving, numbness and weakness in one side of the arm, leg or face. Li Xuewen, Cardiovascular Surgery Department, Shaanxi Provincial People’s Hospital 5.Speech slurred. 6.Unusual rapid weight gain, or ankle swelling (if you find this condition, you should measure your weight every day). 7.Sudden fainting. 8.Fatigue, especially with fever that does not subside within a few days (your doctor will order you to take your temperature twice a day for 2-3 weeks). 9.Chills or high fever. 10.Unusual bleeding or bruising. 11.Darkening of stool color or red urine color, possible internal bleeding condition, for which an occult blood test should be done. 12.Sudden change or disappearance of heart valve opening and closing sound, or abnormal heart rate. 13.Inconsistent heartbeat. 14.Redness and swelling at the incision, oozing and other discomfort occur. 15.There is often a burning sensation at the urethral opening. You should see a doctor as soon as possible if any of the above conditions occur.