<s>[INST] 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 [/INST] Respected user, HiT hanks for using Chat Doctor.come have evaluated your query thoroughly.* Causes may be variable as - allergic bronchitis - recurrent viral or bacterial infection - tuberculosis - childhood asthma - others * Management will depend upon the diagnosis itself which require - pulmonary function test - CT Thorax or diagnostic bronchoscopy according to the need after thorough clinical evaluations. Hope to clarify your query. Welcome for further questions. Thanks for using Chat Doctor .com & giving opportunity to assistWishing your Angel fine recovery Regards dear take care. </s>