Maybe for those who arise in the resurrection of death/damnation and receive Outer Darkness as their reward. You don't need to worry about that.
Ecclesiastes 9:10 says: "Whatever your hand finds to do, do with all your might, for there is no work nor planning nor knowledge nor wisdom in the Grave, where you are going."
Scripture warns of a second death for the wicked and unbelieving when their spirits are destroyed in the lake of fire.
After that, you no longer exist.
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 2:11 KJV — He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death.
Well, since you're worried, have yourself cremated. No brain--no pain.
But since this is in R&S, I guess you're asking about the soul.
The Bible says: “The living are conscious that they will die; but as for the dead, they are conscious of nothing at all.” (Ecclesiastes 9:5; Psalm 146:4) Therefore, when we die, we cease to exist. The dead can’t think, act, or feel anything.
God explained what happens when we die when he spoke to the first man, Adam. Because Adam was disobedient, God said to him: “Dust you are and to dust you will return.” (Genesis 3:19) Before God created Adam “out of dust from the ground,” Adam did not exist. (Genesis 2:7) Likewise, when Adam died, he returned to dust and ceased to exist.The same thing happens to those who die now. Speaking of both humans and animals, the Bible says: “They have all come to be from the dust, and they are all returning to the dust.”—Ecclesiastes 3:19, 20.The Bible often compares death to sleep. (Psalm 13:3; John 11:11-14; Acts 7:60) A person who is fast asleep is unaware of what is happening around him. Likewise, the dead are not conscious of anything. Yet, the Bible teaches that God can awaken the dead as if from sleep and give them life again. (Job 14:13-15) For those whom God resurrects, death is not the end of everything.
參考: New World Translation Bible
Bible Questions Answered p.53
It should be obvious to everyone that there is no pain after death. Many theists are too dumb to know it.
No, even in the bible hell is the grave. Don't worry. That's all it means. You will be in no pain. Just death. You won't exist any longer.