Anosognosia is a clinical condition in which there is an inability to recognize body parts and familiar objects through the organs in the absence of sensory insufficiency, mental decline, confusion, and inattention. It includes visual, auditory, tactile and body part recognition deficits. How do you check for cognitive deficits? The degree of clinical cognition is often determined by the patient’s ability to correctly name a sensory stimulus; to demonstrate its use and usage; and to select the specified stimulus from a series of stimuli. Being able to name indicates only one part of cognition. Aphasia and anosognosia are two different psychological disorders. The inability to name does not mean the inability to cognize; patients with anosognosia are unable to complete the naming of objects, the description of their uses, the demonstration of their usage, and the matching test of objects with objects, while patients with anosognosia can correctly complete the use of objects and the above-mentioned test methods in addition to the inability to name them; therefore, the two need to be distinguished. Anosognosia is a special condition that is rarely seen clinically, and it has a variety of different manifestations. There is no universally accepted classification standard for anosognosia, and different classifications are used either based on the convenience of clinical application or on the historical habits of neuropsychological research. Currently, in neurological practice, the classification of anosognosia is often based on the cognitive processes of the sensory pathways from the perspective of ease of application. This method is convenient and practical, and the different types of anosognosia can be distinguished according to which sensory stimulus information the patient is unable to cognize. Visual anosognosia is a condition in which the patient is no longer able to recognize visually, or is unable to recognize clearly what he or she was able to recognize without difficulty in the recent past, even though the patient’s vision and reasoning abilities are unchanged. The patient’s ability to identify familiar places, things around him, various appearances and even his relatives, and sometimes colors, becomes difficult or even impossible. The main tests are: 1, blood routine, blood biochemistry, electrolytes: pay attention to the specific changes that have diagnostic value for the primary disease. 2, blood sugar, immune items, cerebrospinal fluid examination, such as abnormalities have differential diagnostic significance. 3, the following items have differential diagnostic significance if abnormal. CT, MRI examination; EEG, fundus examination.