There is no such thing as what to eat to get the fastest blood pressure in children, it should be treated according to the cause. Common causes include malnutrition, genetic factors, dehydration, anemia and so on. 1. Malnutrition: usually dietary bias, or dietary structure abnormalities, may lead to malnutrition, resulting in a lack of vitamins, lack of trace elements, etc., the need for timely examination, in order to determine the lack of the case of active supplementation. 2. Genetic factors: children’s low blood pressure may be caused by genetic factors, if there is no discomfort, generally no need for treatment, follow-up observation can be. 3. Dehydration: Dehydration caused by excessive sweating, low water intake, vomiting, diarrhea, etc. can also lead to insufficient blood volume and cause low blood pressure in children, which should be supplemented with electrolytes intravenously to replenish the blood volume in time, and will usually improve gradually. 4. Anemia: common iron deficiency anemia, may also lead to children’s low blood pressure, diet, eat more animal liver, green leafy vegetables and fruits, luxury meats, etc., can also be combined with the oral solution of ferrous sulfate and other drug therapy. Children’s low blood pressure, need to actively seek medical treatment, under the guidance of the doctor.