Jiang Shui's function: Jiang Shui has the functions of expelling wind, dispelling cold, warming lung and relieving cough, which is suitable for patients with wind-cold common cold, but not for patients with wind-heat common cold. Drinking Jiang Shui will accelerate blood circulation, so it is not suitable for patients with infection or bleeding tendency. Ginger is also a spicy food, so it is not suitable for infants and patients with stomach diseases.
Therefore, drinking Jiang Shui can only be said to have a certain effect on patients who have caught a cold, but it has no effect on preventing colds.
To prevent colds, we should take part in proper physical exercise, eat properly, keep warm, and ensure enough rest and sleep to increase the body's resistance, thus preventing colds.