Generally, when you have a cold, you can lose weight to varying degrees, and the cold is mainly due to a decrease in the immunity of the body invaded by pathogens, causing an inflammatory reaction in the mucous membrane of the upper respiratory tract. At this time, the body will appear the performance of immune response, there are fluctuations in body temperature or even the trend of continuous increase in body temperature, there will be a loss of appetite, which will affect the digestion and absorption function, patients eat very little, fever will make the body consume too much energy, there will be wasting, weakness and other symptoms. Therefore, when you have a cold, you need to properly supplement the rich nutrition to prevent too thin to reduce the resistance to the recovery of the cold condition.