DPT vaccination with hard lumps is a common side effect, usually occurring within 3 days after vaccination, there will be local redness, swelling, hard lumps, etc., can be relieved by cold compresses to alleviate the hard lumps of swelling, uncomfortable feeling, but also can be wrapped in a towel placed in the local ice after 3-5 minutes or so, a day can be many times for ice, ice can effectively relieve the localized swelling, discomfort phenomenon, usually after 3 days, the hard lumps can disappear and absorb on their own. After 3 days, the hard lumps of DPT can disappear and be absorbed by themselves. At the same time, parents should pay attention to the local avoid contact with water, to avoid the phenomenon of infection, do not take a bath or use water to wipe, and try to avoid outdoor activities, to avoid the vaccination after the child will appear fever and other phenomena, in the home to closely observe the symptoms can be.