What causes bad breath in children?

There are several causes of bad breath in children, mainly including the following aspects: 1. Oral hygiene issues: Children may not brush their teeth thoroughly or correctly, leading to residual food particles or milk in the mouth. These residues can ferment in the oral cavity and produce an unpleasant odor. 2. Oral diseases: Conditions such as periodontitis and gingivitis can increase bacterial levels in the mouth, potentially causing bad breath. 3. Digestive system problems: Children's digestive systems are not yet fully developed, with insufficient secretion of digestive fluids and weaker gastrointestinal function. This may lead to indigestion or food accumulation in the stomach, which can in turn cause bad breath. 4. Respiratory and nasal conditions: Diseases such as rhinitis and sinusitis may lead to increased secretions that drain into the throat and enter the oral cavity, causing bad breath. 5. Dietary factors: Consuming foods with strong odors, such as garlic and durian, without timely oral cleaning afterward may also result in bad breath. If you have any concerns, please consult a relevant healthcare professional.