Many pregnant women feel sick or vomit during early pregnancy. In most cases it is mild and does not need any specific treatment. In more severe cases, an anti-sickness medicine is sometimes used. Lack of fluid in the body (dehydration) is a complication in severe cases. See a doctor if you suspect that you are becoming dehydrated, or if you are struggling with the symptoms.
This is a companion discussion topic for the original article at https://patient.info/pregnancy/common-problems-in-pregnancy-leaflet/morning-sickness-in-pregnancy