1, poor oral hygiene: most of the baby gum redness and swelling because of poor oral hygiene and other unclean factors stimulation, in addition to the performance of gum bleeding, there are gum redness, swelling, pus and bad breath, etc.. 2, teething: most babies in teething, teething place will have red, swollen, hot, painful local reaction, you can see the local gums white or slightly congested red, touch the gums have a tooth tip-like hard feeling, sometimes the gums will be swollen, the child will cry, and sometimes often eat hands. In addition, the teething bed will feel uncomfortable and there will be more saliva, some children may even have a slight fever, diarrhea or hematoma in the bed of the teeth, each baby has different symptoms, and some children will not even feel it when teething. 3, fire: many times the gums are red and swollen is considered a sign of fire, baby gums red and swollen may also be on fire, this time to pay attention to the baby to lower the fire, eat more food to dispel fire. 4, fever: fever after these post-illness performance, this is a post-illness process, do not worry too much, gum problems best to go to the hospital to see how to reduce swelling, for a long time, this will affect his eating, mouth taste is a digestive problems, after the fever, the child’s gastrointestinal disorders, pay attention to diet regulation.