Friend is nauseous everyday for last 7 days. He is vomiting almost every day now. His stomach is only distended when he feels sick but fine other times of the day. No blood in stool or tar like appearance. Eats 3 meals when feeling well and can go a day without being ill. No specific food seems to be a trigger and he has no known food allergies. Trying to convince him to see a doctor and to get an idea of what may be wrong. He is of a healthy weight, active, non smoker, very light drinker.