Children with headache and nausea, taste in the mouth, need to be alert to ketoacidosis, as well as toxic poisoning may be, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for treatment. 1. ketoacidosis: rehydration, regulation of water electrolyte disorders, correction of acidosis, small-dose insulin intravenous drip, and concurrent infections, the use of effective antibiotics such as cefozoxime and other infection control. 2. Poisoning: some poisonous substances such as cyanide poisoning, can be manifested as a bitter almond taste in the mouth, and accompanied by headache, palpitations, increased heart rate and other manifestations, this time you need to consult a doctor in a timely manner, in accordance with the doctor’s orders to be methylene blue and other drugs first aid. Children with headaches and nausea, a bad taste in the mouth, need to go to the hospital in time to find out the cause of the disease and then treatment.