Baby vaccination lumps are usually caused by the drug is not fully absorbed or poor absorption, you can use hot compresses, magnesium sulfate compresses and other ways of treatment. After the baby vaccination lumps, you can use a warm towel for hot compresses, promote blood circulation, accelerate the absorption of drugs, play a role in reducing the role of lumps. In addition, magnesium sulfate soaked gauze to the hard knot, can accelerate blood circulation, conducive to the dissipation of lumps, general lumps will slowly become smaller. If you take the above measures, the lumps still did not shrink, and redness, swelling, heat, pain and other symptoms, parents need to take their babies to the hospital immediately for examination, symptomatic treatment, do not take medication without authorization, so as not to delay treatment.