When my lo sleep I can hear the sound like inside his throat there is pheglm, anyone any idea how to get rid of it ?

Hi! Not sure if this is the same case for your child, but you can refer to this article: http://www.chrisjohnsonmd.com/2009/06/22/wheezing-in-infants-and-toddlers-what-to-do/ The author (a doctor) highlighted that wheezing is more of a symptom. Hence, I think may be good to consult your doctor for some suggestions.