It is possible to wash your hair when you have a cold. The old saying in the past was that you should not wash your hair or take a bath during a cold because the living conditions in the past were relatively poor and it was easy to get cold in the process of bathing and washing your hair, which would aggravate the symptoms of a cold. Nowadays, living conditions are relatively good, so as long as the temperature of the bathroom is well adjusted and the water temperature is well adjusted, washing hair does not have an aggravating effect on the cold. During hair washing, the water temperature must be adjusted appropriately, preferably about the same as the body temperature, and the temperature of the bathroom should be adjusted to about 25℃ to avoid getting cold. Immediately after washing your hair, you need to use a towel to wipe your hair clean and then use a hair dryer to blow dry your hair, so as not to cause a cold situation, which is not conducive to recovery from a cold or aggravate the cold situation. During the cold period, you must drink more water, rest and eat more fresh fruits and vegetables rich in vitamin C, which can help a lot to promote the recovery from the cold.