Courtesy of Diane Lang Good girl syndrome isn’t just in your head — it can also make you physically ill. “Many women have [good girl syndrome],” Lange told The Post.

If you live in the U.K., you can stream every episode of "A Good Girl's Guide To Murder" for free on BBC iPlayer right now. It will also air later in the month on BBC Three.

'A Good Girl's Guide to Murder' features songs by Billie Eilish, AWOLNATION and more. Here are all the songs in the murder mystery show.

“A Good Girl’s Guide to Murder,” the adaptation of Holly Jackson’s hit YA thriller, is finally set to hit Netflix on Aug. 1 after debuting in the U.K. on the BBC last month.