The patient has a narrow range of consciousness, concentrating on certain inner experiences, while not paying attention to things in the environment and having diminished reactions to the outside world. Thoughts are unclear and sometimes confused. So what tests should be done for hazy state of consciousness symptoms? What are the similar symptoms of hazy state of consciousness? Cranial CT examination: Cranial CT is a new examination method that is convenient, rapid, safe, painless and non-invasive, which can clearly show the anatomical relationship between different cross-sections of the skull and the specific brain tissue structure. Magnetic resonance imaging (MRI): also known as magnetic resonance imaging, is the use of the principle of nuclear magnetic resonance, through the application of gradient magnetic field detection of the emitted electromagnetic waves, according to which the internal structure of the object can be drawn into the image. Neutrophil count (NEUT): Neutrophils are an important component of the body’s defense system and are associated with the body’s non-specific anti-infective processes. These cells have a powerful phagocytic and bactericidal function, which works through chemotaxis, recognition and binding of phagocytic substances, which are then taken up intracellularly and eventually kill and degrade pathogens. EEG: An electroencephalography (EEG) is an instrument that records spontaneous biopotentials from the scalp in a magnified form. Cerebrospinal fluid routine test (CSF): Cerebrospinal fluid is a special body fluid that surrounds and circulates around the brain tissue and spinal cord of the nervous system and plays a vital role in brain protection, nutrition and metabolism. White blood cell count (WBC): A white blood cell count is a count of the number of white blood cells contained in a unit volume of blood. Formerly known as white blood cells, they are an important part of the body’s defense system. Brain evoked potentials: Brain function is examined by brain evoked potentials. Cranial ultrasonography: There are two types of cranial ultrasonography: 1. B-type ultrasonography cranial examination method, mainly used for children within 2 years of age whose fontanelle is not closed, through the fontanelle as a “sound window” to scan. 2. Transcranial color Doppler imaging: through the temporal window, occipital window, orbital window to explore the cerebral arteries, according to the intracranial vascular flow rate, frequency width, flow direction abnormalities or audio abnormalities, etc, Flow direction abnormalities or audio abnormalities are determined and applied to the diagnosis and etiological classification of cerebrovascular diseases. Cerebrospinal fluid cyclic adenosine: Cyclic adenosine phosphate is a substance with a wide range of biological effects in the body and is found in higher levels in brain tissue and cerebrospinal fluid. Therefore, when brain and meningeal disorders occur, the detection of cAMP may be more sensitive than indicators such as protein, glucose, and cell counts because disruptions in cellular metabolism can lead to alterations in cerebrospinal fluid cAMP levels.