Most of these traditions are now a part of history (and in most cases that is a good thing) and most are considered barbaric or evil. Yet ...
Footbinding was a custom practised on young females for approximately one thousand years in China, beginning in the 10th century and ending in the early 20th century. In Chinese foot binding, young girls’ feet, usually at age 6 but often earlier, were wrapped in tight bandages so that they could not grow and develop normally; they would, instead, break and become highly deformed, not growing past 4-6 inches (10-15 cm). Today, it is a prominent cause of disability among some elderly Chinese women.
First, each foot would be soaked in a warm mixture of herbs and animal blood. This concoction caused any necrotised flesh to fall off. Then her toenails were cut back as far as possible to prevent ingrowth and subsequent infections. To prepare her for what was to come next the girl’s feet were delicately massaged. Silk or cotton bandages, ten feet long and two inches wide, were prepared by soaking in the same blood and herb mix as before. Each of the toes were then broken and wrapped in the wet bandages, which would constrict when drying, and pulled tightly downwards toward the heel. There may have been deep cuts made in the sole to facilitate this. You can read more about the terrible practice of foot binding here.
Sati was a Hindu funeral custom, now very rare and a serious criminal act in India, in which the dead man’s widow would throw herself on her husband’s funeral pyre in order to commit suicide. The act of sati was supposed to take place voluntarily, and from the existing accounts, most of them were indeed voluntary. The act may have been expected of widows in some communities. The extent to which any social pressures or expectations should be considered as compulsion has been the matter of much debate in modern times. It is frequently stated that a widow could expect little of life after her husband’s death, especially if she was childless. However, there were also instances where the wish of the widow to commit sati was not welcomed by others, and where efforts were made to prevent the death.
Sokushinbutsu were Buddhist monks or priests who allegedly caused their own deaths in a way that resulted in their being mummified. This practice reportedly took place almost exclusively in northern Japan around the Yamagata Prefecture. Between 16 and 24 such mummifications have been discovered.
For three years the priests would eat a special diet consisting only of nuts and seeds, while taking part in a regimen of rigorous physical activity that stripped them of their body fat. They then ate only bark and roots for another three years and began drinking a poisonous tea made from the sap of the Urushi tree, normally used to lacquer bowls. This caused vomiting and a rapid loss of bodily fluids, and most importantly, it killed off any maggots that might cause the body to decay after death. Finally, a self-mummifying monk would lock himself in a stone tomb barely larger than his body, where he would not move from the lotus position. His only connection to the outside world was an air tube and a bell. Each day he rang a bell to let those outside know that he was still alive. When the bell stopped ringing, the tube was removed and the tomb sealed. You can read more about this practice here.
Sky burial or ritual dissection was once a common practice in Tibet. A human corpse is cut into small pieces and placed on a mountaintop, exposing it to the elements and animals – especially to birds of prey. In one account, the leading mok cut off the limbs and hacked the body to pieces, handing each part to his assistants, who used rocks to pound the flesh and bones together to a pulp, which they mixed with tsampa (barley flour with tea and yak butter or milk) before the vultures were summoned to eat.
In several accounts, the flesh was stripped from the bones and given to vultures without further preparation; the bones then were broken up with sledgehammers, and usually mixed with tsampa before being given to the vultures. In another account, vultures were given the whole body. When only the bones remained, they were broken up with mallets, ground with tsampa, and given to crows and hawks that had waited until the vultures had departed.
The Communist government of China outlawed it in the 1960s so it was nearly a lost tradition, but they legalised it again in the 1980s.