 POUND stands for Pulsatile quality, 4–72 hours in length, Unilateral location, Nausea or vomiting, Disabling intensity.One review article found that if 4–5 of the POUND characteristics are present, migraine is 24 times as likely a diagnosis than tension type headache (likelihood ratio 24).If 3 characteristics of POUND are present, migraine is 3 times more likely a diagnosis than tension type headache (likelihood ratio 3).