Mild symptoms of electrolyte disorders may not affect the IQ of the fetus, while severe symptoms may affect the IQ of the fetus, and timely consultation and treatment are recommended. Electrolyte disorders occur mainly due to unbalanced nutritional intake caused by pregnancy vomiting, which leads to low sodium and potassium, thus causing electrolyte disorders. If the symptoms are mild, such as loss of appetite, indigestion, etc., they can be relieved by adjusting the diet and generally will not affect the IQ of the fetus. If the symptoms of severe vomiting are accompanied by electrolyte disorders such as dehydration, ketosis, dizziness, shock, etc., the untimely treatment may affect the health of the fetus in the mother’s body, and may lead to fetal ischemia and hypoxia, which will ultimately result in incomplete brain development, affecting the development of intelligence. Therefore, it is recommended to go to the hospital for treatment as soon as possible when severe pregnancy sickness occurs.