A dream about having or performing an operation is very lucky.
It means that old wounds and difficult emotions in the dreamer are being healed.
Dreams of this type will be fairly common among the medical practitioners, but among the rest of us undergoing such an operation can be a harbinger of a drastic lifestyle change, whether good or bad will be determined by the rest of the dream.
To watch an operation you will soon hear some news from a family member or a friend, if the operation was a success it will be good news, but, if not it will be bad news.