Rub your back and rub yourself and others. You can rub yourself in the bath. Put a wet towel on your back, tighten both ends of the towel by hand and rub your back hard until your back is hot. Other people's rubbing method: take a prone position and bare back. Let others press and rub up and down along the spine with their palms until it gets hot. Be careful not to use too much force to avoid rubbing the skin. The back rubbing method has the effect of preventing and treating colds, backache, chest tightness and abdominal distension.