A slight redness or swelling at the eye of the needle after pneumonia vaccination is a normal reaction and usually disappears after 2-3 days. If the redness and swelling are obvious, local disinfection with iodophor or a potato tablet can be given to significantly reduce the redness and swelling. If the redness and swelling is more obvious, there is also a sense of fluctuation, lasting longer, consider possible local infection, pus, it is recommended to go to the hospital in a timely manner, if the pus is more obvious, need to incision and drainage, local debridement, so according to the situation to decide treatment.