The Holy Bible clearly teaches that those who do not accept Jesus Christ as LORD and Savior will go to eternal damnation in Hell, where there is suffering for eternity.
Luke 13:28 clearly states that there is torture and suffering in Hell:
God will order Satan to torture those who go to Hell, forever, with no chance of getting out. It is final, when you die, if you have not accepted Jesus Christ.
Do you think suffering from cancer is bad?
Suffering from cancer is nothing compared to the suffering you will have forever in Hell, if you do not accept Jesus Christ as Savior and LORD. If you are a cancer patient, you have tasted the suffering of Hell in a very little intensity (since Hell is millions of times worse, in terms of suffering and pain).