The body that is cut has a damaged meridian. The entire human body is one big reflexive organism. A problem in the liver hits the eyes, the breasts, the sex organs etc.
A C section can cut off the flow to the legs and cause edema 20 years after the fact. The same C section can sedate the thyroid. Appendectomies and episiotomies also affect the meridians.
These so called benign operations really do great damage. The incision does not need to be very large either. Liposuction can be directly related to alopecia universalis. The small needle incisions cut off energy to the body.
The real problem is the delayed reaction to the surgery. Often it comes many years after the fact.