Hello dear user! Welcome to HCM! Generally having nausea and loss of appetite without any other symptoms is suggestive for a viral condition that has affected upper gastro-intestinal tract. If you have burning or pain in or around stomach, it may have been complicated to the stomach inflammation or gastritis. Viral conditions usually don t require medications and antibiotics and they are self healed. We can use supportive medication that are used to treat nausea or pain, and probiotics to ease digestion. I would recommend you domperidone or metoclopramid for nausea, and Ranitidine if you feel pain or stomach burning. Lactic ferments and vitamins are recommended for e better digestion. Meanwhile you should have light meals, soup, fruits, yogurt, etc which are easily digested. If you try these steps and don t get any improvement for some days, have an appointment with a gastroenterologist for further examinations. I hope you will be fine soon. Take care and best wishes! DR ERIOL.