Cough in children why difficult to cure

My 6 year old son in frequency committed cough in winter and spring each year, with many drugs, cough will continue for some time. Why?

Cough is a defensive reflex of the human body. People within the respiratory membrane has many invisible on the surface of Cilia, they continued to swing to the oropharynx, mixed with foreign body in respiratory tract of dust, bacteria and sweeping. When in the respiratory tract inflammation, exudate, bacteria, viruses, and mixed with the damaged blood cells, just like garbage, were sent to the gas pipeline by Cilia. Stacked much, can stimulate afferent hub, causing coughing. Pulmonary aspiration full gas and larynx glottic close. Thoraco-abdominal at the same time force, causes the lungs the air suddenly burst out, those of the respiratory tract \"junk\" row. Therefore, as long as the inflammation is not dissipated, excluding \"junk\" cough will persistent. If forced medication to keep coughs, these \"spam\", the piling up, would increase the infection, and even blocking the airway.

Therefore, in order to stop coughing, only the treatment of primary disease are fundamental measures, but coughing is also has its pros and cons, cons, appropriate use of drugs, relief of symptoms as reasonable.

When you have a cold, hyperemia and oedema of mucosa of upper respiratory, irritating cough, bronchial and lung and not \"spam\" accumulating this cough more harm than good, which can be separately selected children\'s cough syrup, Phenergan cough syrup and cough medicine. These drugs by syrup is the role of inflammation of the covering of the mucosal surface, reduce the stimulation, alleviate the symptoms. But not boiling water take after mixed with water, lest liquid dilute swallowed, lose cover effect.

When you are suffering from bronchitis, pneumonia, trachea and lungs have more \"spam\", that is, not this cough medicine, and should be treated with cough and expectorant medicine, such as fritillary and loquat syrup, natural bulbus fritillariae cirrhosae liquid, these drugs may increase respiratory mucous secretion, thin out the sputum, easier to cough, reduce airway stimulation.

Due to allergic reactions or inflammatory stimulus allows bronchial submucosal edema, bronchospasm, Aperture smaller, increased breathing resistance. This situation mostly bronchitis asthma in children. Phenergan or Lu Mina selection at this time, can receive satisfying results.