Neurasthenia can cause insufficient blood supply to the brain, neurasthenia is due to the human body is in a state of long-term tension and stress, the emergence of extreme nerve excitation and brain fatigue of a disease. The common symptoms of neurasthenia are weakness, easy fatigue, lack of concentration, insomnia, memory loss, etc. Neurasthenia and insufficient blood supply to the brain does not have a close relationship. However, long-term insomnia, nerve excitation will lead to excessive brain excitation, coupled with the patient’s neurasthenia caused by the body’s nutritional deficiencies, it is easy to cause cerebral blood supply insufficiency. From the Chinese medicine point of view, long-term insomnia depletion of qi and blood will lead to the human body qi and blood deficiency, which indirectly leads to insufficient blood supply to the brain, thus appearing dizziness, weakness, panic, poor memory, forgetfulness and other symptoms, these are all belong to the performance of the cerebral blood supply insufficiency, long-term cerebral blood supply insufficiency will also lead to other lesions in the brain.