My baby is 7 months old he always has plegm in this throat dr said it's not in lungs and always coughing at night i'm concerned he will have asthma !

Reflux?: This may be from reflux. Talk to your doctor about it since asthma also needs be ruled out.

Unlikely : I can't take the leap of a phlegmy 7mo to asthma. Most are do to post nasal drainage from environmental irritants or residual reflux. If the kid has a strong family history of asthma, it may emerge later, most males before a year and females by 4 with true wheezing that requires treatment.However, most wheezing in infants is due to infection and disappears by 5.