Iatrogenic disease, or iatrogeneity, refers to any adverse condition or illness that is inadvertently caused by a medical treatment or procedure. This can include a wide range of issues, such as negative side effects from medications, complications arising from surgery, or infections acquired during hospitalization. The term comes from the Greek words "iatros," meaning healer or physician, and "genos," meaning origin or cause.

Examples of iatrogenic diseases include:

* Medication-induced illnesses: These can occur when a patient has an adverse reaction to a medication, such as an allergic response, or develops a new medical condition as a result of taking the drug, such as liver damage from acetaminophen.
* Surgical complications: Complications that arise during or after surgery, such as infection, bleeding, or damage to surrounding tissues, can be considered iatrogenic.
* Hospital-acquired infections: Infections that a patient develops while in the hospital, such as pneumonia or urinary tract infections, are often iatrogenic in nature.
* Radiation sickness: Overexposure to radiation during medical imaging or treatment can lead to radiation sickness, which is an iatrogenic condition.
* Psychological issues: Iatrogenic illnesses can also include psychological conditions that arise from medical treatment, such as post-traumatic stress disorder (PTSD) following a traumatic medical procedure.

Iatrogenic diseases are often preventable or at least reducible through careful monitoring and management of patients' health during and after medical treatments. It is important for healthcare providers to be aware of the potential for iatrogenic illnesses and take steps to minimize their occurrence, in order to provide the best possible care for their patients.