Writhed

The wounded man writhed.

The wounded soldier writhed in pain.

After falling off his bike, Tom writhed around on the ground in pain.

She writhed as one who is in terrible pain, and her limbs were dreadfully convulsed.

My poor friend's face had suddenly assumed the most dreadful expression. His eyes rolled upwards, his features writhed in agony, and with a suppressed groan he dropped on his face upon the ground.