The feeling of bugs crawling on the head may be caused by diseases such as vegetative nerve disorder, head lice disease and peripheral neuropathy. 1. Vegetative nerve disorder: the occurrence of this disease is mainly related to heredity, long-term mental stress, gender, nutritional and metabolic disorders, trauma, poisoning and other reasons. Because patients will have wandering abnormal sensations, some patients will feel that there are bugs crawling on their heads. There will also be symptoms such as numbness of the limbs and fever in the hearts of hands and feet. 2. Head lice disease: the causative agent of this disease is head lice, which can be transmitted through direct contact. Head lice often parasitize the scalp or hair, so patients may feel something crawling on the scalp, and there will also be scalp itching. 3. Peripheral neuropathy: the etiology of this disease is more complex, research shows that it may be related to autoimmune diseases, diabetes, pathogenic microbial infections, heredity, tumors, etc. It can be triggered by trauma, vitamin deficiency, etc., which leads to sensory disorders, which can be manifested as a sensation of bugs crawling on the head. To summarize, there are many reasons for the feeling of bugs crawling on the head, and it is necessary to go to the hospital to improve the examination and clarify the cause of the disease.