question: sir my son is suffering from cough from last six months. some drs. are saying that he is have asthma some other are suggesting something else. recently we had his x-ray blood test and sputum test and sputum test is negative, blood test show TLC as 11800 and rest things are normal and one M.D. suggested that he is having no problem but bacterial infection. he cough everyday either mild or sever. kindly suggest what is the problem and   solution