I told you in advance that I am a medical student, that is, a doctor. Your weight 1 m 68 is a little low. You are a teacher. I guess you seldom exercise, which has a lot to do with your thinness. First, you exercise more, people are alive, not dead, so you should exercise more. Second, you should have regular work and rest, eat regularly, sleep regularly, don't be partial to food, and don't consume too many calories, otherwise you will get indigestion and stay up late. Staying up late hurts the kidneys and should be avoided as much as possible. If accompanied by loss of appetite, the water is not good. If you can't digest well, you should take some drugs to help digestion, such as hawthorn pill, or Jianweixiaoshi tablets. Remember to smoke less, especially at night and after meals! Don't drink too much. Moderate drinking is beneficial to blood circulation, while excessive drinking will damage the liver. Finally, it is very important to keep a good attitude. People are most afraid of worrying, especially you. All diseases are caused by the heart. It is very important to remember this. I don't care if you watch it or not. I am a doctor. I have done my duty. I wish you the best of health!