When Sharisse Zeroonian experiences stress, anxiety or feels her period coming on, she might throw up as often as 15 times an hour — episodes of vomiting that could go on for days at a time. Then, she ...

Pregnancy. Morning sickness is a common symptom of pregnancy, but sometimes nausea and vomiting persist well beyond the first trimester. Source: Wellcome Trust Collection. Attribution 4.0 ...