3 adjectives to describe painfulness

Its ugly apparition and the sharp amazing painfulness of its bite were too much for Mr. Carrington's equilibrium.

Its ugly apparition and the sharp amazing painfulness of its bite were too much for Mr. Carrington's equilibrium.

His wounded head beat with tremendous and straining painfulness, as though it would burst asunder, and he was possessed by a burning thirst that seemed to consume his very vitals.

3 adjectives to describe  painfulness