Warning: This episode contains mentions of bullying and suicide.A rising tide of mental health problems among teenagers has sent parents, teachers and doctors searching for answers. This week, the U.S. surgeon general, Dr. Vivek H. Murthy, offered one: social media.Today, Dr. Murthy discusses his proposal to require platforms such as YouTube, TikTok and Instagram to include warning labels, like those that appear on tobacco and alcohol products.Guest: Dr. Vivek H. Murthy, the U.S. surgeon general.Background reading: Dr. Murthy cannot unilaterally impose warnings on social media; the action requires approval by Congress. Dr. Murthy said he would urge Congress to require a warning that social media use can harm teenagers’ mental health.Read a guest essay by Dr. Murthy: Why I’m Calling for a Warning Label on Social Media Platforms.For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.