How long should a nose bleed persist before you call 911?

A nosebleed that lasts for an extended period can indicate a more serious condition, requiring prompt medical intervention. If a nosebleed persists for 30 minutes without signs of stopping, it is generally considered necessary to seek medical help by calling emergency services. This duration is significant because a prolonged nosebleed could be a sign of underlying health issues such as clotting disorders, hypertension, or injury that would require professional assessment and potential treatment.

Timely intervention is crucial as it allows healthcare providers to assess the situation and determine the best course of action, potentially preventing further complications. Therefore, 30 minutes serves as a benchmark for when to take action and seek help, ensuring the safety and well-being of the individual experiencing the nosebleed.