Numbness of the scalp is not necessarily a brain tumor, but also scalp infection, brain lesions, trigeminal neuralgia, cervical spondylosis, head trauma, psychiatric disorders and so on. The causes of scalp numbness include nerve involvement, blood vessel involvement, and emotional factors. 1. Head infection: when the patient suffers from herpes, boils and other head infections will cause local sensory nerve disorders in the head, appearing scalp numbness. 2. Brain lesions: when the patient has encephalitis, cerebrovascular disease, due to the head sensory apparatus, sensory nerves, sensory conduction problems will appear scalp numbness, the patient will also be accompanied by vision loss, nausea, vomiting, dizziness, headache and other symptoms. 3. Trigeminal neuralgia: Trigeminal neuralgia patients with problems in the head sensory apparatus, sensory nerves, sensory conduction will have the symptom of numbness of the scalp. 4. Cervical spondylosis: patients with cervical spondylosis may suffer from numbness of scalp due to problems of receptors and sensory nerves in the head. 5. Head trauma: patients suffering from head trauma can cause head circulation disorders leading to scalp numbness. 6. Mental illness: patients with depression, anxiety, schizophrenia and other mental illnesses can sometimes have numbness of the scalp due to sensory conduction disorders. Of course, brain tumors can also be manifested as numbness of the scalp, it is recommended that patients go to the hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor active treatment.