Generally full-term newborns are inoculated with BCG vaccine within 2-3 days after birth, which generally does not cause a feverish reaction, and after 2-3 weeks of inoculation, a small local hard knot appears, which gradually softens to form a small pustule or abscess, and penetrates the skin to form a shallow ulcer with a diameter of no more than 0.5cm, scabs, and the scabs fall off, which can leave permanent scars, so the child is full of months, the local inoculation of BCG vaccine are pustules. normal phenomenon. Under normal circumstances, when small ulcers appear to protect the wound from infection, try to keep dry when bathing, occasionally into the water is not a problem, with a dry towel to wipe clean and observe on the line. Usually, BCG vaccination does not cause any abnormal reaction, but some babies may have swollen lymph nodes in the armpit, if it is more than 1cm and cannot subside by itself, it is recommended to go to the pediatrician for an interview.