If the headache is caused by eating red beans and barley, it may be due to the patient’s individual physical differences. Or red beans, barley diet is not clean, not fresh, causing patients to appear headache symptoms is also possible. If the headache, you need to actively find the cause of the headache for treatment. If the headache is severe, if accompanied by nausea and vomiting, consider that it may be caused by bad food, etc., and gastrointestinal dysfunction is caused, you can take symptomatic headache relief drugs to relieve the headache. You also need to visit the hospital for stool and blood tests to determine whether the headache symptoms are caused by red beans and barley or not, and whether there is a relationship with the gastrointestinal flu.