Normally, the site of the prophylactic injection should be sterilized, and normal injections are only mildly painful, and septic infections rarely occur. In some cases, such as tuberculosis vaccination, there may be a slight local septic reaction, which is a normal reaction. If treated, it may affect the effectiveness of the vaccine, and less antibodies may be formed in the future, affecting the effectiveness of the vaccination. If pus occurs after vaccination, anti-inflammatory treatment is not recommended, and excessive local intervention is not recommended. If the infection is particularly serious and affects systemic changes, or even if the infection is more serious and leads to fever and local swelling, a doctor should be consulted to make a relevant judgment and give relevant treatment. Usually minor redness, swelling and a small amount of secretion at the site of vaccination can be avoided without treatment to avoid future vaccination failure due to poor vaccination results and serious problems in the future, and generally local septic changes do not require treatment.”