An hour after eating milk still spit up, may be a normal performance, or functional indigestion, acute gastroenteritis and other factors, as follows. 1. Normal performance: if in infancy, an hour after eating milk still spit up the situation, it may be a normal performance, at this time the development of the cardia of the baby’s stomach is still immature, after eating cardia will be horizontal state, easy to cause spitting up. 2. Functional dyspepsia: If eating too much or eating too fast causes dyspepsia, it is easy to have gastrointestinal accumulation of food and flatulence, thus causing spitting up. 3. Acute gastroenteritis: If you do not pay attention to dietary hygiene, so that bacteria into the gastrointestinal tract, repeated stimulation of pathogenic bacteria, easy to cause nausea, vomiting and other symptoms, and this time is accompanied by mental depression and other manifestations. An hour after eating milk vomiting, but no other adverse reactions, generally do not need special treatment; if in the vomiting at the same time also accompanied by loss of appetite, indigestion, body wasting, etc., need to consult a doctor in a timely manner.