Right. Paul describes it as a separation from the Lord's presence
2 Thessalonians 1:7 And to you who are troubled rest with us, when the Lord Jesus shall be revealed from heaven with his mighty angels, 8 In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ: 9 Who shall be punished with everlasting destruction from the presence of the Lord, and from the glory of his power;
So, we can see here that Paul describes the punishment as being separated from "the presence of the Lord, and from the glory of his power". I believe the torment they experience is not physical torture or anything like that, but rather feelings of sorrow and regret over rejecting the Lord and what He offered to them and missing out on everything He has for those who accept Him.
Here are the scriptures that explains hell,
Romans 9:29 KJV
And as Esaias said before, Except the Lord of Sabaoth had left us a seed (Jesus), we had been as Sodoma, and been made like unto Gomorrha.
Genesis 19:24 KJV
Then the LORD rained upon Sodom and upon Gomorrah brimstone and fire from the LORD out of heaven;
Fire and brimstone rained down on Sodom and Gomorrah, and that event is a “type” and/or identify the same fire that hell is comprised of.
Psalms 11:6 KJV,
Upon the wicked he shall rain snares, fire and brimstone, and an horrible tempest:
this shall be the portion of their cup.”
Revelation 21:8 KJV
“But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with
fire and brimstone: which is the second death.”
Revelation 14:10 KJV
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:
Brimstone is sulfur. Google what happened when brimstone mix with fire?
Earth's core contain vast amounts of sulphur - volcanos erupt due to sulfur reaching very high temperatures.
There are planets in the solar system full of sulfur and their surface continue to burn. This solar system is darkness - outer darkness.
Now just think where might be the outer darkness the Bible speaks about?
Matthew 25:30 KJV
“And cast ye the unprofitable servant into outer darkness: there shall be weeping and gnashing of teeth.”