The wow sound that infants make from time to time may be a normal physiological phenomenon, or it may be due to vitamin D deficiency and other reasons. Since infants cannot speak, they like to express their needs by crying, such as wailing when they are hungry or cold. Timely breastfeeding and increasing or decreasing the amount of clothing can solve such problems, so there is usually no need to worry about it. In addition, infants with vitamin D deficiency, which is easily accompanied by calcium deficiency, may scream easily, which can be relieved by taking vitamin D drops and calcium gluconate. If your baby is screaming a lot, go to the hospital and follow your doctor’s instructions for the use of the above medications.