Increasingly large handwriting (dysgraphia) is one of the clinical manifestations of cerebellar ataxia causing disorders of random motor coordination. Damage to the cerebellar hemispheres leads to ataxia of the ipsilateral limbs. Posture maintenance and completion of random movements in the human body are closely related to the brain, basal ganglia cerebellum, vestibular system, and deep senses. Damage to these systems will result in poor coordination of movement, balance disorders, etc. These signs and symptoms are called ataxia. How are tests performed to confirm the diagnosis of Dacryoarthritis? Laboratory tests: Necessary and selective ancillary tests include: (1) Cerebrospinal fluid examination. (1) Cerebrospinal fluid tests. (2) Blood tests, blood electrolytes, blood glucose, and urea nitrogen. Other auxiliary tests: (1) CT and MRI. (2) Cranial base film, electromyography, electrocardiogram, ultrasound. (3) Vestibular function measurement.