In the clinic, we often meet parents who bring their newborns and babies to the doctor, saying that their children’s belly button has “pus” or “water” all the time, and many of these cases are diagnosed as “umbilical velvet” after the doctor’s examination. Many of these cases are diagnosed by doctors as “umbilical velvet” after examination, but many parents do not know what umbilical velvet is, and even some worry that it is something bad that has grown. In layman’s terms, umbilical cord velvet is a polyp-like growth with a slightly reddish, cherry-red appearance and smooth, moist surface that appears on the traumatic surface of the umbilical cord after it has fallen off in children. There may be a small amount of “pus”-like discharge, and the discharge may be constant, or a small amount of bloody discharge if it is not touched during care. The umbilical cord is usually located in the center of the navel and has several forms: (1) rice-grain shaped, about the size of a green bean, lying flat in the center of the umbilicus; (2) tip-shaped, red in color, the swelling is large on the top and small on the bottom, thinning near the umbilicus; (3) thick, red swelling is large, sometimes more than 0.5 cm in diameter, and the root is not thinning; (4) combined with other conditions, such as sinus tracts or fistulas. Treatment of umbilical velvet The umbilical velvet will not disappear with the use of common topical medications. Generally, 10% silver nitrate cautery is available for rice-like umbilical velvet; the tip-like umbilical velvet is first ligated with thread, and the residual part is then cauterized with 10% silver nitrate. The drug silver nitrate cautery is used properly, the baby is not painful, only drug corrosion, the treatment effect is very good. Thick umbilical cord velvet mostly requires surgery, which is relatively simple. Other methods such as laser treatment are also available. Umbilical cord fungus with comorbidities usually requires hospitalization for examination and treatment.