How TikTok users saved an influencer’s life

Viewers helped save Alex Griswold’s life after they noticed something on his skin that didn’t look right.
2:44 | 01/21/20

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Transcript for How TikTok users saved an influencer’s life
helped save a young man's life. Viewers spotted something on his skin that didn't look right. Alex is a hugely popular presence in tiktok. Posting funny and uplifting videos about his life to his fans. Two of those fans noticed something and reached out in concern and thankfully Alex heard them. It's the app that has people dancing. Do the two-step Reporter: Lip-syncing. My name is Skylar Reporter: And now even saving lives. Tiktok reportedly used by more than 500 million people worldwide connecting two people, one with a dangerous looking mole, a possible sign of skin cancer. Here's how tiktok solved my life. Reporter: Alex sharing this with his 500,000 followers. Here's what it's like being married. A shot of his back and a mole that shot catching the eye of two of his followers including melanoma survivor Lizzie wells. And I immediately paused the video and I was like, I need to get ahold of this person and so I commented on the video. When the second person Lizzie reached out to me I saw she was actually a skin student and so I realized she might also know what she's talking about and so that's when I actually decided to make an appointment to go to the dermatologist. Then they were like, dude, that might be skin cancer. So doctors finding that the mole on his back was irregular and removed it. When we got the results back, she actually said that it was a moderately atypical mole which means that it was headed towards skin cancer. Reporter: Wells who is studying to become a doctor says she was happy she was able to help. Going through the trauma myself you just don't want other people to go through that. And the doctor was like whoever told you probably saved your life. Reporter: Alex took to tiktok to publicly thank the tipsters. I am so thankful they reached out. I would have gone years without going to the dermatologist and wouldn't know what would happen. This is a perfect reminder that the world is a wonderful place. In our interview Liz say told us something she learned. The a, B, C, D, E method. A, asymmetry, suspicious moles, B, border. They tend to be uneven. C, color, multiple colors are also a warning sign. D, diameter or D.A.R.K., if it's darker than others you have and E, evolving. It's changing in shape, color or texture. If you experience any of these symptoms see a dermatologist because, of course, in these types of situations time is never on your side. Yes, right. That's right. Boy, that's really good information to pass along. Thank you, Amy.

This transcript has been automatically generated and may not be 100% accurate.

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