sentences:  Symptoms include facial reddening, nausea, vomiting, malaise, agitation, palpitations and tingling in limbs, and arise five to ten minutes after consumption of alcohol.If no more alcohol is consumed, they will generally subside over two or three hours.Symptom severity is proportional to the amount of alcohol consumed, becoming evident when blood alcohol concentration reaches 5 mg/dl, and prominent at concentrations of 50–100 mg/dl.