Children, like adults, can develop bad breath if they do not clean their mouths properly. When a child has bad breath, many children do not want to play with him. So as a parent it is important to keep abreast of the problem of bad breath in babies. So what causes bad breath in children? First, food halitosis, after eating onions, ginger, garlic, leeks, fish and shrimp, mutton and other foods, food halitosis can often occur, but stop using these foods, halitosis one to two days will disappear naturally. Use tea, dates in the mouth chew some time, bad breath will be reduced. Second, corrosive halitosis, caused by oral hygiene, such as not brushing your teeth in the morning and evening, do not rinse your mouth after meals, the accumulation of tartar on the gum source, and the food residue in the crevices of the teeth, fermented and corrupted to give off the smell of odor. Eliminate this bad breath should pay attention to oral hygiene, with a cavity in time to hospital treatment. Third, acidic halitosis, mostly seen in children, is a kind of indigestion caused by gastrointestinal dysfunction, often smell this odor when belching. After the treatment of gastrointestinal function recovery, bad breath will disappear.