<s>[INST] My three and a half year old has thrown up two nights in a row.  She seems fine during the day but has woken up around 4:30 am 2 morning in a row to throw up.  The first night her vomit was thick and clear.  Last night was thick and mixed with her dinner.  She seems to be back to normal as soon as she throws up.  What should I do to help my baby?  Thanks. [/INST] Hi, Thankyou for your question. Throwing up at nighttime can be because of either reflux disease or coughing episode at nighttime. If she has not got other associated symptoms of flu or allergy with cough then most probably it is because of reflux disease. To diagnose reflux you may get 24 hours PH test done and discuss with doctor. And to prevent from vomiting you can give spy.ondansetron before sleeping. Hopefully my answer will be helpful. Chat Doctor.  </s>