The 5th Bowl of Wrath - Sores and Pain
Fifth angel's bowl had darkness for the kingdom of the beast and painful sores for mankind.
See ninth Egyptian Plague. Exodus 10:21-22 Darkness upon Antichrist's kingdom.
Fifth plague: so painful were the sores on their bodies that they eat their tongues in agony (pain) but still they cursed God and refused to repent ( turn to God and ask forgiveness)
Background Reading:
Revelation 16:10-11
The fifth Bowl of Wrath - Sores and Pain
10 The fifth angel poured out his bowl on the throne of the beast, and his kingdom was plunged into darkness. Men gnawed their tongues in agony 11 and cursed the God of heaven because of their pains and their sores, but they refused to repent of what they had done.