Which of the following findings is commonly seen in patients who experience alcohol withdrawal?

Formication is a tactile hallucination where individuals feel sensations on or under their skin, often described as insects crawling over them. This symptom is particularly associated with alcohol withdrawal and is indicative of the heightened autonomic arousal and neurological disturbances that can occur when someone who is dependent on alcohol suddenly reduces or eliminates their intake. Patients in withdrawal may also experience a range of other symptoms, such as tremors, anxiety, and confusion, but formication is a distinct experience that highlights the sensory distortions that can arise during this process.

In contrast, while severe memory loss can occur in long-term alcohol users due to Wernicke-Korsakoff syndrome, it is not specifically seen in the acute withdrawal phase. Severe abdominal pain can arise from other medical conditions but is not a hallmark of alcohol withdrawal. Frequent hallucinations can occur during withdrawal, particularly delirium tremens, but tactile hallucinations like formication are a more defining characteristic specifically linked to withdrawal.