Crisis hotlines are telephone services that provide immediate support to individuals in distress or facing emergencies. They are staffed by trained professionals or volunteers who listen, offer guidance, and help callers find resources. These hotlines are available 24/7 and can address various issues, including mental health crises, suicidal thoughts, and substance abuse. Many crisis hotlines are specific to certain populations or issues, such as the National Suicide Prevention Lifeline in the United States or the Samaritans in the UK. They aim to create a safe space for individuals to express their feelings and receive the help they need without judgment.