A cough, especially a persistent one, can be quite troublesome and uncomfortable. Coughs can be caused by an excess of population or by consuming sweets or extremely cold substances. Coughing is also considered by many as a way for the body to remove harmful viruses and mucus which may have accumulated in the throat.
http://EzineArticles.com/8138678
http://EzineArticles.com/8138678
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