There are hard lumps in the place where the baby is vaccinated

1. Normal local reactions After vaccination, due to the stimulation of vaccine components, local inflammatory reactions may be caused, resulting in hard lumps. In this case, hard lumps usually fade away after a period of time. Generally do not need special treatment, but can be appropriate hot compress to promote the dissipation of hard lumps. 2. Injection technical factors If the injection is too shallow or the injection site is not accurate, it may also lead to the formation of local hard lumps. At this time, you can observe first, if the hard lumps continue to disappear or other discomfort symptoms occur, you should seek medical attention in time. 3. Individual differences Some babies may be more sensitive to vaccine reactions, more prone to hard lumps and other reactions. For such babies, pay more attention to the changes in hard lumps and the overall state of the baby. 4. Although infection is rare, if there are signs of infection such as redness, pain, fever, etc. at the inoculation site, it may indicate that infection has occurred. This requires immediate medical attention and anti-infective treatment. Parents should keep calm and closely observe the condition of the hard mass and the baby's condition when they find that there is a hard mass in the place where the baby is vaccinated. If the hard mass does not subside for a long time, abnormal changes occur, or the baby is accompanied by other discomfort symptoms, be sure to take the baby to the doctor in time to clarify the cause and take correct measures. At the same time, at the next vaccination, the doctor should be informed of the situation so that the doctor can make a more appropriate assessment and recommendation.