complaint
This word carries a tone of grievance and entitlement, often implying that the speaker believes a wrong has been committed that requires correction. In a professional or legal setting, it transforms from a mere expression of unhappiness into a formal document that triggers a specific administrative process. When used in a medical context, the word is softer and more descriptive, shifting from a sense of anger to a report of symptoms. It describes the specific problem a patient brings to a doctor, stripped of the social friction associated with complaining to a manager or authority figure.
Countable when referring to a specific instance of a grievance or a specific medical illness. Uncountable when referring to the general act or habit of complaining.