Although it is autumn, the weather is still hot, and there are always people who say that they are drowsy all day because of the heat. But it could also be some danger signs in the brain. Today we will talk about what are the symptoms of insufficient blood supply to the brain. Symptoms of mild cerebral insufficiency 1. abnormal mental consciousness: drowsiness all day long, always wanting to sleep, which is caused by cerebral insufficiency and is regarded as a precursor symptom. And a few patients may also show insomnia, personality changes, such as withdrawn, silent or indifferent expressions, a bit of polyglot impatience; some may experience transient loss of consciousness or mental decline. 2, motor nerve dysfunction: often manifested as drooling, aphasia or slurred speech, difficulty swallowing, weakness or inactivity of one limb, unstable walking or sudden fall. These are often aura symptoms and last for a short time. 3. Sensory dysfunction: Patients may feel facial numbness, tongue numbness, lip numbness; or blurred vision, or even suddenly one side of the eye is completely unreadable; many people have a sudden sense of vertigo; some also have tinnitus, hearing loss and other symptoms. Symptoms of insufficient blood supply to the brain These symptoms are relatively mild, and many people do not pay special attention to them. Sometimes they think it may be affected by the heat, physical fatigue, or bad mood, so it gives an opportunity for the condition to deteriorate. If the cerebral blood supply is insufficient, the following symptoms will appear: 1. Dizziness, especially sudden vertigo. Sudden unexplained falls or fainting. 2. Nausea and vomiting or fluctuations in blood pressure. Drowsy desire to sleep throughout the day – drowsy state. 3.Patients with cerebral blood supply deficiency have involuntary twitching on one side or one limb. 4, numbness of the limbs, suddenly feel numbness on one side of the face or hands and feet, some for tongue numbness, lip numbness. Limb weakness or immobility. Short-term loss of consciousness and sudden change of intelligence. Insufficient cerebral blood supply is the most common cerebrovascular disease in middle-aged and elderly people, usually related to atherosclerosis caused by underlying diseases such as hyperlipidemia, hypertension and diabetes. The formation of atheromatous plaques in the arteries can lead to arterial narrowing, which can affect the blood supply to the brain and cause some neurological symptoms. Early treatment is needed if symptoms of cerebral insufficiency of blood supply occur in daily life.