Baby vaccination, needle eye red, may be the following reasons: 1, normal reaction, generally after vaccination, there will be needle eye, slightly red phenomenon, even if it is even a small needle eye is also considered a wound, need to heal, there is a process, do not have to worry too much. 2, allergic reaction, the nature of the vaccine is a protein, a lot of milk, eggs, etc. Allergy babies, will be vaccinated after the vaccine, triggering an allergic reaction, some mild allergic reaction is localized red, swelling, etc. If there is no systemic rash, breathing, and other serious reactions occur, you can first observe. Some mild allergic reactions, that is, local redness and swelling at the needle eye, if there is no generalized rash, breathing difficulties and other serious allergic reactions occur, you can first observe, you can take oral anti-allergy medication, but also in the eye of the needle, to give disinfection treatment. 3, local skin breakdown, infection, the baby’s skin is very delicate, some children in the vaccine, there will be a localized skin infection, or even necrosis! Parents must observe daily, changes in the wound at the needle eye, and take timely measures when necessary.