Bad breath after waking up is usually caused by improper oral care, improper feeding, Helicobacter pylori infection and food accumulation. Parents need to pay attention, timely take the baby to the hospital for relevant examination, clear diagnosis, give symptomatic treatment. Common causes and treatments 1, improper oral care: baby gradually add complementary foods, improper oral care, such as not brushing teeth, can lead to residual food residues in the mouth fermentation, causing bad breath. So babies need to clean their mouths in time after teething, avoid drinking milk when they go to sleep, and reduce the intake of sweets. Parents also need to go to the hospital on a regular basis to check the development of teeth; 2, improper feeding: the baby’s digestive system is not well developed, if you add the complementary foods for high sugar, high fat food, such as chocolate, fat meat, etc., can increase the burden on the baby’s intestinal tract, abdominal distension, abdominal pain, halitosis and other symptoms. So it is advisable to choose to eat light, easy to digest food, such as pumpkin porridge, egg custard, etc.; 3, Helicobacter pylori infection: baby gastrointestinal infection Helicobacter pylori, can be due to bacterial decomposition of urea to produce ammonia, which in turn cause bad breath. Usually under the guidance of a professional doctor to use omeprazole, amoxicillin and other drugs antibacterial treatment. In daily life, you need to share meals and avoid the occurrence of mouth-to-mouth kissing babies as well as the behavior of pinching each other’s food, etc.; 4. Accumulation of food: babies experience accumulation of food due to indigestion, resulting in a large amount of food accumulating in the stomach and causing fermentation, which will also produce bad breath after waking up. In daily life, you need to avoid overeating and spicy, stimulating and other foods, such as chili bars, chili peppers and so on. Precautions after breastfeeding and feeding, you can exercise your baby to rinse his mouth with water and clean up milk stains and food residues in time to ensure oral health.