Jason Pierre-Paul: Bloody Hospital Pic ... Day After Fireworks Accident

Jason Pierre-Paul just posted a photo that was taken at his hospital bedside on July 5th -- one day after the fireworks accident that blew up his hand.

JPP wrote, "July 5th I remember."

In the pic, you can see the NY Giants star elevating his right arm -- which is heavily wrapped up and red from the bleeding. You can also see blood on his hospital gown.

Miraculously, JPP not only recovered from the injury -- but eventually got back on the field and played with the Giants ... turning out a pretty impressive performance considering the circumstances.

In fact, the last time we spoke with JPP, he was in such good spirits about his situation -- he even joked about not being able to play video games anymore.