"And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away. Revelation 21:4"
Pain is a localized physical suffering associated with bodily disorder: death, sorrow, and crying are all the by-products of pain.
When death, sorrow, and crying occur, many tears are shed. Death, sorrow, and crying will continue to occur on earth till Jesus Christ comes again to put an end to it.
No wonder in heaven there is no pain, because God shall wipe all tears and stop all manner of things that cause pain. What remains is rejoicing and celebrating the Father and our Lord and Savior Jesus Christ.
Dearly beloved, do you have a burning desire to go to heaven? It is a glorious place to be, praise the LORD!