Patients feel ants crawling in their body, the causes are mainly considered the following aspects: First, it may be caused by peripheral nerve injury, when the patient’s peripheral nerve has demyelination changes, the patient will show numbness of the limb, may have the feeling of ants crawling, can be clarified by doing electromyography examination, seen in peripheral neuropathy caused by diabetes, or long-term heavy alcohol consumption, the body The second aspect is that if the electromyogram is not done, the peripheral neuropathy may be caused by a deficiency of B vitamins. Secondly, if the electromyography examination is not problematic, and there is no tumor or occupancy in the patient’s head MRI, it should be considered as a result of phytodysfunction, which is related to the patient’s own psychosomatic factors, and this kind of patients are usually more nervous and anxious, so they are prone to somatization symptoms, which manifest as a feeling of ants crawling in the body.