What should parents do if children has phlegm that cannot be easily coughed up?
Q:What should parents do if children has phlegm that cannot be easily coughed up? A: To analyze the causes of phlegm production The human respiratory tract has the function of self-purification with phlegm that produced as the body responds to infection, inflammation or other stimuli, for which sputum is composed of pathogens and necrotic cell ...