Nine-month-old babies do not eat well, may be due to physiological factors, may also be due to the lack of nutrients, oral ulcers and other pathological factors. 1. Physiological factors: nine-month-old babies are curious about the outside world, or usually do not develop the habit of eating well, there may be the phenomenon of not eating well, remove the triggers, good guidance can be resolved. 2. Nutritional element deficiency: when the child is deficient in zinc or iron deficiency symptoms, there can be xenophagia, taste buds develop abnormally, resulting in decreased appetite, do not eat well. 3. Mouth ulcers: can cause pain in the mouth, increased salivary secretion, reduce appetite, the phenomenon of nine-month-old babies do not eat well. There are other reasons why nine-month-old babies don’t eat well, it is recommended to consult a doctor in time to identify the cause and treat the cause.