Common symptoms of gastric reflux cough in children include vomiting and acid reflux, painful swallowing, vomiting blood or black stool, and fever. 1. Vomiting and acid reflux: newborns and infants and young children with vomiting as the main manifestation. Most of the children vomit in the first week after birth, and some of them have symptoms in the first 6 weeks after birth, and in severe cases, the vomit is in the form of jet. The vomit is stomach contents, sometimes containing a small amount of bile. In older children, regurgitation, acid reflux, belching (hiccups) and other symptoms are common. 2. Painful swallowing: infants and young children show difficulty in breastfeeding, irritability, refusal to eat, older children may express pain when swallowing. 3. Vomiting blood or black stools: Gastric reflux may cause severe esophageal erosion or ulceration, resulting in vomiting blood or black stools. 4. Fever: Reflux can directly or indirectly trigger aspiration pneumonia repeatedly, causing respiratory tract infections such as coughing up sputum and fever. Children with gastric reflux cough may also have other manifestations, should go to the hospital in time, under the guidance of the doctor for treatment.