Incident 29-day-old newborn baby Ahnaf (pseudonym) has been brought in due to jaundice. It weighs 3 kg 200 g and has a head circumference of 36 cm. The parents said that this was their first child after seven years of marriage. Educated guardian. Only breastfeed the baby. Now due to the increase in jaundice, the parents have insisted on bringing the child to the specialist. What is neonatal jaundice? Newborn babies , who are born healthy with normal gestation and weight , have 25 to 50 percent elevated bilirubin levels (seven milligrams / deciliter) or visible jaundice. The rate is even higher in the case of premature (pre-term) newborns. But it turns out that most of these jaundices are physiological or innocent jaundice. Innocent jaundice occurs in newborns within 24 to 72 hours, and at 10-12 days of age, if the baby is healthy and normal , drinking breast milk well , it will heal on its own. If jaundice in a newborn appears within the first 24 hours of life, or if it lasts for more than seven days in a full-grown newborn and more than 14 days in a premature newborn , it must be tested. Congenital thyroid hormone deficient child may have jaundice at the age of 29 days . The exact cause of chronic jaundice in newborns has to be determined through physical examination and some laboratory tests. Hormonal-crisis problems in a newborn with just a sign of chronic jaundice, even if no other symptoms are present, can lead to congenital hypothyroidism or thyroid hormone deficiency crisis from birth. The same thing happened with Ahnaf. The level of T-4 is quite low and the level of THS is quite high. Congenital malformations of the thyroid gland. Her immediate treatment began with thyroid hormone medication. We can see the development of Ahnaf's healthy-normal physical-mental intelligence and beautiful smile as he was not deprived of treatment for a long time. Who can say how many more Ahnafs in remote areas of Bangladesh are becoming physically and mentally handicapped human beings without getting timely diagnosis and medical care . Symptoms of neonates suffering from congenital hypothyroidism. Thyroid hormone secreted by the thyroid gland is an essential element in the development of the human brain. Lack of it hinders the child's physical growth and development of intelligence. Children are short and mentally handicapped. Newborns born with thyroid gland congenital problems are born with certain characteristics. Although the weight and height are normal, the head fence is a bit extra. Problems with breastfeeding , rough skin , dull softness of the body , silver on the back of the head. Once or less daily bowel movements , large tongue , less movement , swelling , water retention , facial and umbilical hernia এসব these are considered symptoms of congenital hypothyroidism in newborns. The child's well-being depends on a quick diagnosis and immediate hormonal medication. The rising sun on the day of bringing Ahnaf for treatment has been successful for all of us. Pranab Kumar Chowdhury is a pediatrician