Hot Naraka
Sañjīva – the "reviving" Naraka. In this Naraka the ground is made out of hot iron heated by an immense fire. Beings in this Naraka appear fully grown, already in a state of fear and misery. As soon as the being begins to fear being harmed by others, their fellows appear and attack each other with iron claws. Or else, the attendants of Yama appear and attack the being with many fiery weapons. As soon as the being experiences an unconsciousness like death, they are suddenly restored to full health and the attacks begin again. Other tortures experienced in this Naraka are having melted metal dropped upon them, being sliced into pieces, and suffering from the heat of the iron ground. Life in this Naraka is 162*1010[citation needed] years long. It is said to be 1000 yojanas beneath Jambudvīpa and 10,000 yojanas in each direction.
Kālasūtra – the "black thread" Naraka. Here, in addition to the torments mentioned above, black lines are drawn upon the body, and Yama's servants cut the beings upon the lines with fiery saws and sharp axes. Life in this Naraka is 1296*1010 years long.
Samghāta – the "crushing" Naraka. This Naraka is also upon a ground of hot iron, but is surrounded by huge masses of rock that smash together and crush the beings to a bloody jelly. When the rocks move apart again, life is restored to the being and the process starts again. Life in this Naraka is 10,368*1010 years long.
Raurava – the "screaming" Naraka. Here beings run wildly about, looking for refuge from the burning ground. When they find an apparent shelter, they are locked inside it as it blazes around them, while they scream inside. Life in this Naraka is 82,944*1010 years long.
Mahāraurava – the "piercing" Naraka. Punishment in here are for people who maintain their own body by hurting others. In this hell, ruru animals known as kravyāda torment them and eat their flesh. Life in this Naraka is 663,552*1010 years long.
Tapana – the "heating" Naraka. Here Yama's servants impale the beings on a fiery spear until flames issue from their noses and mouths. Life in this Naraka is 5,308,416*1010 years long.
Pratāpana – the "great heating" Naraka. The tortures here are similar to the Tapana Naraka, but the beings are pierced more bloodily with a trident. Life in this Naraka is 42,467,328*1010 years long. It is also said to last for the length of half an antarakalpa.
Avīci – the "uninterrupted" Naraka. Beings are roasted in an immense blazing oven with terrible suffering. Life in this Naraka is 339,738,624*1010 years long. It is also said to last for the length of an antarakalpa.
These Narakas by no means exhaust the tale of possible sufferings. Some sources imagine five hundred or even hundreds of thousands of different Narakas. In Chinese Buddhist texts, the numbers and types of Narakas were elaborated in a variety of creative ways; see Di Yu for examples of this sort of treatment.
The sufferings of the dwellers in Naraka often resemble those of the Pretas, and the two types of being are easily confused. The simplest distinction is that beings in
Cold Naraka
Arbuda – the "blister" Naraka. This is a dark, frozen plain surrounded by icy mountains and continually swept by blizzards. Inhabitants of this world arise fully grown and abide life-long naked and alone, while the cold raises blisters upon their bodies. The length of life in this Naraka is said to be the time it would take to empty a barrel of sesame seed if one only took out a single seed every hundred years.
Nirarbuda – the "burst blister" Naraka. This Naraka is even colder than the one above, and here the blisters burst open, leaving the beings' bodies covered with frozen blood and pus.
Atata – the Naraka of shivering. Here the beings shiver in the cold, making an at-at-at sound with their mouths.
Hahava – the Naraka of lamentation. Here the beings lament in the cold, going ha, ho in pain.
Huhuva – the Naraka of chattering teeth. Here the beings shiver as their teeth chatter, making the sound hu, hu.
Utpala – the "blue lotus" Naraka. Here the intense cold makes the skin turn blue like the color of an utpala waterlily.
Padma – the "lotus" Naraka. In this Naraka the blizzard cracks open the frozen skin leaving one raw and bloody.
Mahāpadma – the "great lotus" Naraka. Here the whole body cracks into pieces and the internal organs are exposed to the cold and they also crack.
Each lifetime in these Narakas is twenty times the length of the one before it.
Naraka are confined to their subterranean world, while the Pretas are free to move about.