Hi,
There can be several causes of
nausea at night which are mainly due to disturbances in the gastrointestinal tract. Any problem like acidity in the stomach,
heartburn, an ulcer can cause it. I don't know your gender, if you are females then definitely you can have during the time of periods.
It can also be from the use of any deodorant, room freshener, spray.
It can be controlled by taking light meals in the evenings, taking a brisk walk after eating in the evening, taking small meals in a day, avoiding coffee before sleep.
You can also try
Domperidone tablet but I feel you will feel better by non-drug measures.
Still, if there is no improvement in symptoms after following this protocol then get yourself checked by a physician to identify a particular cause.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Soheel Hussain Zargar,
Dentist