Anger or wrath is an intense negative emotion.
Annoyance is an unpleasant mental state that is characterized by such effects as irritation and distraction from one's conscious thinking.
Emotion is any conscious experience characterized by intense mental activity and a certain degree of pleasure or displeasure.
In psychology, frustration is a common emotional response to opposition, related to anger, annoyance and disappointment, frustration arises from the perceived resistance to the fulfillment of an individual's will or goal and is likely to increase when a will or goal is denied or blocked.
Pathology (from the Ancient Greek roots of pathos (πάθος), meaning "experience" or "suffering" and -logia (-λογία), "study of") is a significant field in modern medical diagnosis and medical research, concerned mainly with the causal study of disease, whether caused by pathogens or non-infectious physiological disorder.
Physiology is the scientific study of normal mechanisms, and their interactions, which work within a living system.
Psychiatry is the medical specialty devoted to the diagnosis, prevention and treatment of mental disorders.
Resentment (also called ranklement or bitterness) is a mixture of disappointment, anger and fear.
Sociology is the scientific study of society, patterns of social relationships, social interaction, and culture.