Whether infusion is good for a cold or not cannot be generalized. Usually, infusion is not good for a cold, as it can easily cause dysbiosis and multiple flora infections in the body, and too much infusion can also cause fungal infections, resulting in a decrease in the patient’s immunity. If the infusion volume is too large, it will also affect the heart function, increase the burden on kidney and liver, induce heart failure, induce drug insensitivity and multi-drug resistance, etc. Therefore, it is not recommended to carry out infusion treatment immediately when you have a cold. However, if a cold is accompanied by a high fever or a blood count that is more than twice the normal baseline or a significant increase in C-reactive protein, and if oral medication does not relieve the cold, infusion therapy is recommended. In case of dehydration in the case of gastrointestinal flu, rehydration therapy is necessary.