The redness, swelling and hardness of the place where the baby has been vaccinated can be observed temporarily, if it still does not subside, hot compresses can be taken, and if necessary, consult a doctor as soon as possible. Vaccination place red swelling and hardness belongs to the vaccination of the immune response, generally do not need special treatment, most of the red swelling and hard lumps in the 2 ~ 3 days after vaccination can be self-absorbed, so you can temporarily observe and do not deal with it, and try to avoid contact with water as well as local stimulation of the vaccination site. If the swelling does not subside after 24 hours, you can apply warm compresses to the lumps to promote their dissipation and absorption. If the above measures are ineffective and the redness, swelling and hard lumps do not subside after 3 days, or gradually become bigger or even ulcerated, it is recommended to consult a doctor to receive standardized diagnosis and treatment in time.