Padre Pio's body decayed like any human body...
When, 40 years after his death, the Vatican had the body of the deceased exhumed, it was in a skeletal state of decomposition like any dead human body.
Her face is going to be covered in hand-painted silicone as part of a post-mortem reconstruction for public display.
The image below clearly shows the recomposed face in silicone but also the emaciated hands of a decomposed corpse (see the hand on the crucifix).