mask phenomenon

Post-emetic purpura that follows prolonged vomiting—‘retching’—appearing as evanescent punctate macules on the face/upper neck, thought to be due to abruptly increased intrathoracic pressure; similar lesions occur in violent coughing, Valsalva maneuver, or strangulation, accompanied by conjunctival petechiae

mask phenomenon

Post-emetic purpura that follows prolonged vomiting–'retching', appearing as evanescent punctate macules on the face/upper neck, thought to be due to abruptly ↑ intrathoracic pressure; similar lesions occur in violent coughing, Valsalva maneuver, or strangulation, and accompanied by conjunctival petechiae
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