AIO- Weird guy on Reddit says he's a dermatologist

Not really sure where to post this. I received a message from this guy (or girl idk) saying his friend referred him to my profile because I have skin issues and recently I did post on a subreddit asking for help with my skin.

However, I just got an overall weird vibe. I don't know if he is truly a dermatologist or not. Maybe I entertained him because I can't afford a dermatologist. Idk. Anyways, should I block him or is that an overreaction?

Thanks for reading.