The document discusses the nocebo phenomenon in patient-doctor communication. Nocebo refers to negative symptoms induced by negative suggestions from clinical staff or a patient's own expectations. Unintentional negative suggestions from doctors and staff can induce new symptoms or worsen existing ones through psychological and neurobiological mechanisms. A study found that surgeons and anesthetists commonly use nocebo words and phrases when communicating with patients, such as emphasizing negatives, focusing on pain, and causing uncertainty. The conclusion is that nocebo phenomenon exists in clinical practice and doctors should be educated to avoid subtle negative messages that can negatively impact patient outcomes.