Iatrogenesis
Iatrogenesis (from the Greek for "brought forth by the healer") refers to any effect on a person, resulting from any activity of one or more other persons acting as healthcare professionals or promoting products or services as beneficial to health, which does not support a goal of the person affected.While some have advocated using the term to refer to all "events caused by the health care delivery team", whether "positive or negative", consensus limits use of iatrogenesis to adverse effects, including (in the broadest sense) all adverse unforeseen outcomes as well as foreseen outcomes from medication or other medical treatment or intervention. Some iatrogenic effects are clearly defined and easily recognized, such as a complication following a surgical procedure (e.g., lymphedema as a result of breast cancer surgery); less obvious ones, such as complex drug interactions, may require significant investigation to identify.
Cases of iatrogenesis may include:

complications arising from a medical procedure or treatment
side effects of possible drug interactions
medical errors
negligence
use of contaminated instruments
anxiety or annoyance in the patient, physician or treatment provider in relation to medical procedures or treatments
unnecessary medical treatment resulting from a physician's decisionUnlike an adverse event, an iatrogenic effect is not always harmful. For example, a scar created by surgery is said to be iatrogenic even though it does not represent improper care and may not be troublesome.