Torments in Hell:
In spite of the flames, Hell is totally dark:
Matthew 8:12: "But the children of the kingdom shall be cast out into outer darkness..."
Matthew 22:13: "...take him away, and cast him into outer darkness."
Matthew 25:30: "And cast ye the unprofitable servant into outer darkness..."
Torturing prisoners with sulphur:
Revelation 14:10: "...and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb."
Worms -- apparently flesh-eating:
Mark 9:44-48: "Where their worm dieth not..." The immortal worm is repeated three times in this passage for emphasis. One point of interest is that the author of Mark refers to "their worm" not to "the worms." That seems to imply that each prisoner has his own worm.
Extreme thirst:
Luke 16:23-26: "And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame."