Type D refers to a personality type characterized by a tendency towards negative emotions and social inhibition. Individuals with this personality type often experience feelings of anxiety, sadness, and worry, which can lead to avoidance of social interactions. They may struggle with expressing their emotions and often feel misunderstood by others. Type D is often studied in the context of health psychology, as it has been linked to various health issues, including cardiovascular diseases. Understanding this personality type can help in developing strategies for better emotional regulation and improving social support systems for those affected.