When you have a cold, your body resistance is very low, try not to wash your hair at this time, because washing your hair will aggravate the symptoms of the cold, so it is recommended to consider washing your hair after you recover from the cold. At the same time, you should actively use drugs to treat the cold, mainly some cold punch and cold capsules, such as cold and fever granules, compound aminophenalkylamine capsules. During the cold period, you should eat more easily digestible food, drink more water and eat more fresh vegetables and fruits to replenish plant fiber. The cycle of cold is usually 5-7 days, and the symptoms will be relieved gradually after using the medicine. If the symptoms of cold do not improve after a week, you should go to the respiratory medicine department of the hospital for detailed examination and treatment.