Lower respiratory infection with cough of any time that the sticky liquid to wonder why? This is a type of mucus secreted by mucous membranes. He, who was the medieval times, the mucus was one of four physical humor. This physical humor that affect the health authority is the body of fluids. Cold and humidity, with the mucus to the property. This mucus was related to a person who was apathetic and sluggish behavior. Thus, the old has been upheld by the words believe in the word phlegmatic. We know more coughing up phlegm.
