My child is 1 year old. He is having ruttle sound from past 15-20 days. He has no cough or cold. But after waking up each time he cough due to excess mucus in throat and his voice becomes heavy . And most of time he sounds like ruttling. But he has no problem with that. No sound in breathing. But when he try to say voice becomes heavy. What is the treatment for that. Currently we are not giving any medicine but thinking now because more days have been passed. Kindly guide me