You can't lose weight if you have a cold, because most of the weight loss is through exercise. If you do this, your body will easily sweat. After sweating, your body will easily catch cold or catch cold again in the shower, so it will easily lead to the aggravation of the cold. Therefore, it is not recommended to lose weight during a cold. You'd better drink more brown sugar and Jiang Shui to relieve symptoms when you have a cold.