What is a potential indicator of psychological dependence on substances?

Experiencing cravings or urges is a significant indicator of psychological dependence on substances. This phenomenon reflects the intense desire to consume the substance, which often occurs despite awareness of the negative consequences. Cravings can significantly impact an individual's ability to function and make rational decisions, showcasing the psychological hold that the substance has over them. In the context of substance use, cravings are a central feature of addiction, indicating that the individual may rely on the substance not just physically but psychologically as well to cope with various aspects of life.

The other options provide important context about an individual’s overall well-being but do not specifically illustrate psychological dependence. Social withdrawal may be a behavior seen in individuals struggling with addiction, but it does not directly address the internal experience of dependence. Lack of emotional support can contribute to substance use, but it is not a direct indicator of dependence itself. Physical ailments are typically associated with physiological dependence rather than psychological dependence, making them less relevant in identifying this specific aspect of addiction.