In a significant cybersecurity incident, a widely used health tracking app has suffered a massive data breach, affecting more than 80 million users across the globe. The breach, which came to light earlier this week, has compromised sensitive personal information including names, email addresses, and even health records.

Cybersecurity experts are calling this one of the largest leaks in the health tech sector in recent years. While the name of the app hasn’t been officially disclosed due to ongoing investigations, sources suggest it’s among the top five fitness and wellness apps on the market.

What makes this incident especially concerning is that health data—unlike passwords—can’t simply be changed. Users may not feel the impact immediately, but stolen health records and personal identifiers can be misused for insurance fraud, phishing scams, or even identity theft.

Authorities in the U.S., Europe, and Asia have begun inquiries into the breach, and regulatory agencies are urging the app’s developers to enhance their security protocols. Meanwhile, cybersecurity analysts recommend that users change their passwords and enable two-factor authentication if possible.

The company behind the app has issued a brief statement, saying they’re “working with security experts and law enforcement” to address the breach and protect user data.

If you’ve used a health tracking app recently, it’s a good idea to check your email for any alerts or password reset prompts. While not all users are confirmed to be affected, staying cautious is key in such situations.