**Core Concept:**
The question is about a patient presenting with psychiatric symptoms following a cocaine binge. The symptoms described, specifically feeling as if insects are crawling under the skin, align with a specific phenomenon.

**Why the Correct Answer is Right:**
The correct answer, D. Cotard's Delusion, is a psychiatric disorder characterized by the belief that one's internal organs do not exist or are absent. This delusional belief, also known as Negative Delirium, can be seen in patients with severe psychiatric disorders, often as a result of substance abuse or neurological diseases. In this case, the patient experiences Cotard's Delusion following a cocaine binge.

**Why Each Wrong Option is Incorrect:**
A. Cotard's Delusion is not specifically related to alcohol abuse, making option A incorrect.
B. This option refers to a psychiatric disorder characterized by auditory hallucinations, which is different from the described symptoms in the question.
C. This option is related to a psychiatric disorder characterized by persecutory delusions, not the described symptoms.
D. Cotard's Delusion is specifically associated with substance abuse, particularly cocaine, making option D the correct answer.

**Why the Correct Answer is Right:**
Cotard's Delusion is a rare psychiatric disorder that presents with the belief that one's internal organs do not exist or are absent. This delusion is often observed in patients with severe psychiatric disorders, particularly those related to substance abuse or neurological diseases. In this case, the patient's Cotard's Delusion is the result of the cocaine binge, leading to the patient's belief that insects are crawling under his skin. Cotard's Delusion is a unique phenomenon that highlights the relationship between psychiatric disorders and substance abuse.

**Clinical Pearl:**
Cotard's Delusion is a rare but important phenomenon for medical students and clinicians to recognize, as it demonstrates the potential consequences of substance abuse on mental health and the importance of considering psychiatric evaluations in patients with severe substance-induced symptoms.