Blood letting is the most common technique followed by ancient practitioners. They used to make a cut on any part of the body and allows the blood to let away if a patient suffers from a disease. Treplanation refers to boring the holes on skull to let away the evil spirits and reform the bone deformities.This was a very old technique of medicine.They used animal dung,lizard blood,mud and dead mice for curing diseases. These treatments led to infections and tetanus.If a person has toothache, he was advised to keep a human skull with him while sleeping so as to prevent evil spirits.If a patient sufferd from headaches and cramps, physician would advise him elixir containing human flesh, blood or bone. This is called corpse medicine !!!!!!!!!!!