<s>[INST] Eight year old vomited in bed after being asleep. Didnt complai. Of any issues before bed, ate normal meals, played outside before bed. Has had nasal congestion for 2-3weeks. Also vomited last week early in morning, then remainder of day was fine-running around, eating, etc. Is is post nasal drip/drainage causing him to vomit? Hes been coughing A LOT at nite lately and has started to during the day for last 2 days. [/INST] Well come to HCMHIpost nasal drip in this age group is not likely and this could be allergic condition and if this is associate with the secondary infection then this need to be treated with anti-biotic some time such condition take little more time, hope this information helps. </s>