Hi thanks for contacting HCM... Here you are having acute stomach flu means viral infection of stomach which is leading vomiting , diarrhea and headache also.... Symptomatic management done ... Maintain hydration with lots of water along with ORS.... For vomiting take domperidone or metoclopramide tablet .... Small meal taken with frequent interval... Heavy fatty food restricted.... Fruits taken more ... Avoid gastric irritants like .... Smoking Excess spicy Non veg food Alcohol Excess tea, coffe etc... For headache simple analgesic can be taken .. If no benefit consult physician for examination... Take care