My son is 5 year old and after every 10 days he has cold. But its not running. I can hear/ feel the chest congestion and phelgum cause of that he sleeps with open mouth. Also 1 more issue I saw grey hair in his head which is quite surprising for me and worrisome too. Please suggest.

Suggestions offered by doctors on Lybrate are of advisory nature i.e., for educational and informational purposes only. Content posted on, created for, or compiled by Lybrate is not intended or designed to replace your doctor's independent judgment about any symptom, condition, or the appropriateness or risks of a procedure or treatment for a given person.