All the more that you have to give bath to your 6 year old coughing child, a speedy warm bath is good enough to open skin pores, remember that the skn is the largest organ of the body, an excretory organ too. Warm bath would not only open skin pores but will also stimulate good blood circulation thus helps the condition of your coughing child because once you have good blood circulation, blood becomes active in transporting nutrients to & removing wastes from the cell. In alternative medicine particularly healing comes from inside going out, we have to clear the eliminative channels to rid off wastes because if the system is loaded with wastes it delays healing & or forms another illness by which the weak parts or organs becomes the first target..