We have sure word of prophecy, Foggle. Some characteristics of Hell are described in the Bible.
And if thy hand offend thee, cut it off: it is better for thee to enter into life maimed, than having two hands to go into hell, into the fire that never shall be quenched:
Where their worm dieth not, and the fire is not quenched. Mark 9:43,44
So in Hell the fires are eternal, and the "worm" -- disease, metaphorically -- is never cured.
Elsewhere Hell is described as a pit, as at the "roots of the mountains", and as a lake of fire. In Revelation the damnation of souls to Hell is described, and Hell is a place of endless torment.
The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb:
And the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name. Revelation 14:10,11
There are other Biblical clues as to the nature of Hell, but I'm going to leave it to you to search them out.
Comment