Damage to the abducens nerve requires a search for the cause of the damage to the abducens nerve. Because the abducens nerve has the longest course at the base of the skull, it is most susceptible to damage, and abducens nerve palsy is the most common among single cranial nerve palsies. The common clinical causes are as follows: 1, diabetes mellitus, diabetes mellitus control is not good, it is easy to cause adductor nerve palsy, if the patient has a history of diabetes mellitus, blood glucose has been poorly controlled, we should consider this reason, the main thing is to control blood glucose, and at the same time, use of drugs to promote the restoration of nerve function. 2, idiopathic adductor neuritis, this kind of inflammation is non-specific may be and immune-related inflammation, the patient starts more quickly, and the patient is more likely to be injured, but the patient is more likely to be injured. This kind of inflammation is non-specific and may be related to immunity, the patient starts to have a quick onset of disease, and it affects monocular more. If this cause is considered, the use of hormones in the treatment, but also can be used to promote the recovery of nerve function of the drug.3, if both sides of the abducens nerve paralysis, there are obvious symptoms of headache, may be caused by cranial hypertension. The main thing is to use dehydrating agents to control the symptoms of cranial hypertension.4. Tumors at the base of the skull can lead to damage to the abducens nerve, which can be manifested as limited eye abduction on the affected side, and surgical treatment can be considered.