If you don't go on a diet to lose weight, you may lose weight because you have no appetite and don't eat much, or because of physical reasons, you can't absorb it well. Generally speaking, if there are no artificial reasons in the short term, you will suddenly lose weight; Or within a month, you lost 10 kilograms. Even if you don't feel strange, you should seek medical advice in time. Especially for middle-aged and elderly people, once they suddenly become thinner, it is best to exclude tumors. Probably sick. My colleague was a good eater for a while. When I was slightly fat, I couldn't even lose weight. She was good at eating during that time. Instead, I lost sixteen pounds a month. She was happy at first. As a result, I got hyperthyroidism when I went to the hospital for examination.