Redness around the eye of the needle after vaccination is a common adverse reaction during vaccination, which may be caused by improper operation, infection, allergy, etc. If the baby is not in discomfort and the general condition is good, you can observe at home and keep the wound clean and dry. If the symptoms are serious, it is recommended to go to the hospital in time to determine the cause of the disease and treat the cause. Common causes and treatment methods 1, improper operation: vaccination when vaccination too fast, improper manipulation, may lead to red around the eye of the needle, mostly belongs to the normal phenomenon. Cold towels or potato slices can be used to apply cold compresses, and the symptoms can generally be relieved. In addition, attention should be paid to timely pressure after vaccination to prevent bruising and redness at the injection site. 2. Infection: After vaccination, redness is caused by germ infection at the eye of the needle, and most of them are caused by streptococcus. It needs to be cleaned and disinfected, and protection is needed. Iodine disinfectant and hydrogen peroxide can be used to relieve the symptoms; 3. Allergy: If the child has redness at the eye of the needle, red spots on the local skin and fever after vaccination, it is usually caused by allergy. Oral medications such as loratadine, vitamin C, calcium gluconate, etc. can be taken to control the symptoms. In addition, topical mucopolysulfate ointment can also be used for treatment. Precautions advise the child to get enough rest, make sure to drink more water, pay attention to local hygiene, and monitor the child’s temperature change in time. If the symptoms are serious, you need to seek medical attention in time to avoid delaying the condition.