The sound of blood vessels pulsating in the brain when the patient lowers his head or lies down to sleep may be caused by physiological reasons, vascular malformation, high blood pressure, etc., which need to be treated for the cause of the disease, such as medication and surgery. 1. Physiological reasons: for example, after drinking a lot of alcohol, alcohol can lead to blood vessel dilatation, resulting in the patient’s head down or lying down to sleep can feel the sound of blood vessel pulsation, in this case, when the alcohol in the body after metabolism, the symptoms will disappear, no need for special treatment. 2. Vascular malformation: malformation of blood vessels on the surface of the head can cause patients to hear the sound of blood vessels pulsating when they lower their heads or lie down to sleep, in which case they need to go to the hospital for cerebral angiography and interventional surgery. 3. High blood pressure: when the blood pressure is too high, the patient may hear the sound of blood vessel pulsation when he/she lowers his/her head or lies down to sleep, and when it is serious, it will be accompanied by headache, nausea, dizziness, etc. In this case, the patient should take antihypertensive drugs orally, such as timosartan, nifedipine delayed-release tablets, etc., and the symptom can be relieved when the blood pressure decreases. There are many other reasons that lead to the sound of blood vessels pulsating in the brain when you lower your head or lie down to sleep, it is recommended that you go to the hospital in time to clarify the cause of the disease and then carry out treatment, do not blindly self-medication.