Nausea is a common symptom of Covid-19. You should constantly sip lukewarm water or herbal tea to help get some relief from nausea with Covid-19. Also, if the condition persists, you may ask your physician to prescribe medication for the same. Some experience indigestion and gas after COVID- 19. Therefore, keeping your diet simple and wholesome and resting will help you get your digestion back on track post-recovery from the illness.