This can be common if you do not prepare. Many people would rather live with pain than with post operative nausea and vomiting.
This is one of the greatest fears. Learn how anesthesia personnel keep this from happening
Much depends on the surgery but in most cases it can be controlled.
Big drops in blood pressure can cause great risk. There are many causes for shock and treatments depending on the cause.
Bacteria can often lead to infection which can spread to all parts of the body endangering the patient and recovery
Occasionally something can go wrong. Learn about the reactions to anesthesia.