Chronic inflammatory demyelinating polyneuropathy is a rare immune-mediated polyneuropathy pathology of the peripheral nervous system. The presence of etiological factors in the patient, such as type 1 and 2 diabetes mellitus, alcohol intoxication in the anamnesis or other causes of polyneuropathy, which are often found in practice, can disguise chronic inflammatory demyelinating polyneuropathy and lead to delayed diagnosis of potentially curable polyneuropathy, which further increases the likelihood of disability of the patient and a significant decrease in the quality of his life. The clinical case under consideration is a demonstration of such diagnostic difficulties, which led to a delayed diagnosis of chronic inflammatory demyelinating polyneuropathy against the background of alcohol abuse in the debut of neurological disorders.