Failure to drink water in early pregnancy is usually due to a pregnancy reaction, which may lead to acidosis if accompanied by symptoms such as severe nausea and vomiting. Pregnant women may experience nausea and vomiting in early pregnancy due to pregnancy reactions, which leads to the inability to replenish the water they need in time to eat properly. The fat in the body will become a substitute. The concentration of ketone bodies increases when too much fat is broken down, and when the acid contained in the ketone bodies accumulates too much in the blood, it can make the normal pH of the blood unbalanced in favor of acid and cause acidosis. Pregnant women often show symptoms of fatigue, weakness and thirst, which can be accompanied by nausea, vomiting, dry mouth, dry skin and mucous membranes, decreased blood pressure, excessive urination and headache. If a pregnant woman has symptoms such as severe nausea and vomiting in early pregnancy, is unable to consume the water her body needs, and at the same time develops the above symptoms, it is recommended that she seek medical attention in a timely manner and under the guidance of a doctor.