What can cause sickness and diarrhea?

Gastroenteritis is a very common condition that causes diarrhoea and vomiting. It's usually caused by a bacterial or viral tummy bug. ... Most cases in children are caused by a virus called rotavirus. Cases in adults are usually caused by norovirus (the "winter vomiting bug") or bacterial food poisoning.Feb 17, 2016 read more

The causes of vomiting differ according to age. For children, it is common for vomiting to occur from a viral infection, food poisoning, milk allergy, motion sickness, overeating or feeding, coughing, or blocked intestines and illnesses in which the child has a high fever. The timing of the nausea or vomiting can indicate the cause. read more

Many of the causes below may result in both vomiting AND diarrhea, however, at other times it could only cause vomiting OR diarrhea. The development of symptoms may be linked to the intensity or severity of a condition or concentration of exposure to toxins and may only cause nausea and loose stool. read more