My kids has vomiting sensation only in night what...

What is the possible cause of your kid medical condition ?
1. medication side effects 
2. low blood pressure 
3. low blood sugar 
4. anemia 
5. ear infection and diseases
General advices to relieve nuasea ?
1. make sure you eat well , healthy food should be a main part of your diet and drink plenty of water
2. make sure you are not taking any medication that cause dizziness as a side effect ( which is common )
3. avoid stress and have plenty of rest
4. take anti-dizziness medication such as : meclizine 
5. if you medical condition presisted or new symptoms appeared , consult an pediatric doctor as soon as possible 
What is the needed tests :
1. physical examination by doctor 
2. vital signs 
3. blood test