<p>Hyperemesis gravidarum (HG) is a pregnancy complication that is characterized by severe nausea, vomiting, weight loss, and possibly dehydration. Signs and symptoms may also include vomiting many times a day and feeling faint. Hyperemesis gravidarum is considered more severe than morning sickness. Often symptoms get better after the 20th week of pregnancy but may last the entire pregnancy duration.</p><p>The exact causes of hyperemesis gravidarum are unknown. Risk factors include the first pregnancy, multiple pregnancy, obesity, prior or family history of HG, trophoblastic disorder, and a history of eating disorders. Diagnosis is usually made based on the observed signs and symptoms. HG has been technically defined as more than three episodes of vomiting per day such that weight loss of 5% or three kilograms has occurred and ketones are present in the urine. Other potential causes of the symptoms should be excluded including urinary tract infection and high thyroid levels.</p><p>Treatment includes drinking fluids and a bland diet. Recommendations may include electrolyte-replacement drinks, thiamine, and a higher protein diet. Some women require intravenous fluids. With respect to medications pyridoxine or metoclopramide are preferred. Prochlorperazine, dimenhydrinate, or ondansetron may be used if these are not effective. Hospitalization may be required. Psychotherapy may improve outcomes. Evidence for acupressure is poor.</p><p>Source: https://en.m.wikipedia.org/wiki/Hyperemesis_gravidarum</p>