Umbilical pain is generally associated with acute cystitis and irritable bowel syndrome. If the patient is female, ectopic pregnancy and endometriosis may be causes. Many drugs, including alcohol, opioid analgesics (such as morphine), cannabis (marijuana), and chemotherapy drugs, can cause nausea and vomiting. Toxins, such as lead or those found in some foods and plants, can cause severe nausea and vomiting. But if the US goes too far, it could end up entering a war it badly needs to avoid. The horror of the conflict between Israel and Gaza is already bad enough, but a larger conflagration would be a Usually, a child vomiting at night is due to a short-term illness, such as a virus or food poisoning. In other cases, it may be a sign of an underlying illness or problem. Various illnesses can Print. As many as 90% or more of pregnant people experience some degree of nausea or vomiting, often colloquially referred to as "morning sickness". For some, it is relatively mild, coming and The main symptoms of cyclic vomiting syndrome are sudden, repeated attacks—called episodes—of severe nausea and vomiting. You may vomit several times an hour. Episodes can last from a few hours to several days. Episodes may make you feel very tired and drowsy. Each episode of cyclic vomiting syndrome tends to start at the same time of day VMbN.