How to boil ginger water can cure colds, can you drink it at night?

Cooking ginger water is recommended to add ginger, scallion segments and other boiling water to cook for 20~30 minutes, and then take it to cure colds and flu, and you can also drink it at night.
Ginger water boiling method is as follows: clean the appropriate amount of ginger, without peeling, cut into coins of the size of the same time, while adding the appropriate amount of green onion, brown sugar, etc., and then add a certain amount of water to decoction, about 20 ~ 30 minutes after the fire out, dry to the temperature of the mouth can be taken while hot.
The ginger water has the effect of relieving cold (removing cold from the surface of the muscle) and warming the stomach, and is suitable for treating colds and coughs caused by wind-cold.
Ginger water is usually taken in the morning. But for the treatment of colds, ginger water at night or before going to bed, can play the role of sweating cold, cover the quilt, to promote sweating, so as to play a better role in the treatment of colds.