HELLO DR,MY 13 MONTH OLD BABY HAS HAD BLOCKED NOSE SINCE HE WAS 5WEEKS OLD,AND SINCE THEN HE HAS BEEN BREATHING THROUGH HIS MOUTH,HIS MOUTH IS CONSTANTLY OPEN IT THE DAY TIME AND AT NIGHT.I HAVE TRIED STEAM INHALLATION TO USING OTRIVIN NASAL DROPS,ALL TO NO AVAIL.PLS HELP MY BABY.IT BRAKS MY HEART TO ALWAYS SEE HIM BREATHING THROUGH THE MOUTH CONSTANTLY