If the area of redness and swelling is too large, it is not normal, perhaps skin infection or local allergy, it is recommended to go to the hospital for a surgical examination to identify the cause, before the next treatment measures, you can go to the hospital again to do a PPD test to see if the BCG vaccination is successful, if not successful or to do another vaccination. The actual skin is usually clean and hygienic, do not eat spicy and stimulating food, eat more fruits and vegetables, and eat a light and easily digestible diet.