Teething — it’s happened to all of us and none of us remember it, but everyone knows it makes babies cry.

While the actual process is much longer and arguably more painful, it only takes an unusual time-lapse video 20 seconds to show just why that’s the case.

(H/t Mental Floss)

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Ceudy Gutierrez reads a book to her 2-year-old son, Matias, at their home in Buford, GA, on Tuesday, Nov. 18, 2025. Ceudy Gutierrez is struggling to make ends meet for herself and her three young kids following her husband’s ICE arrest earlier this fall. (Miguel Martinez/ AJC)

Credit: Miguel Martinez-Jimenez