Six-month baby nausea may be swallowed gas, indigestion, gastroesophageal reflux and other conditions lead to. 1. swallowed gas: six months baby dry nausea may be because in the baby eating too much or too fast and crying situation, resulting in swallowed a lot of gas, into the cause of nausea. 2. indigestion: six months baby nausea may also be caused by indigestion, usually also appear bloating, diarrhea and other symptoms. 3. Gastroesophageal reflux: Gastroesophageal reflux in six-month-old babies can occur when food irritates the pharynx, which usually manifests itself in nausea and other symptoms. Six-month baby nausea may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.