Hello sir, my son is of 2.5 years old. He often get stuffy nose and cough immediately which lasts for 3 days of severity in cough with wheezing. He will be hospitalized to reduce that, this happens sometimes more frequently in about 10-15 days. No doctor has said the exact reason, I am much worried about that cough as that will be continuously dry cough and he can't even speak.please help