This condition is called hyperemesis gravidarum, and researchers believe that it may be caused by hormones released by the placenta, according to the U.S. National Library of Medicine. Hyperemesis gravidarum is characterized by severe vomiting, which makes it difficult for them to eat and causes constipation. You may also experience nausea, vomiting, confusion, fatigue, rapid heart beat, low blood pressure, hypotension, food aversion, headaches, fainting, severe fatigue, or extreme fatigue. Symptoms typically begin around one month into pregnancy and peak between nine and thirteen weeks. Symptoms often begin to subside after 14-20 weeks, but up to 20% of women with this condition need care throughout their entire pregnancy, according to the American Pregnancy Association.
Left untreated, people with this condition will start losing weight, which can affect the birth weight of their baby (per Obstetrics & Gynecology). TheCleveland Clinic suggests calling your doctor if you vomit more than twice a day, have nausea that lasts all day and prevents you from eating and drinking, experience weight loss, have bloody or brown vomit, have a fast heart rate, or show signs of dehydration.