The dripping sound heard in the ear while sleeping is a symptom of tinnitus, which may be caused by ear plugging effect, mastoid ductal venous malformation, jugular vein bulb elevation and other reasons. 1. Ear plugging effect: due to sleeping posture, the head is placed sideways on the pillow, the local temporal area or the arterial vessels in the ear area are pressurized, thus tinnitus will occur, which may lead to the ear and brain to hear the dripping sound while sleeping. 2. Mastoid ductus venosus malformation: due to the malformation of vascular development, the cranial blood flow load will be increased in a quiet state, which will also cause the ear to hear the dripping sound in the head during sleep. 3. High jugular vein bulb: the presence of high jugular vein bulb may cause the patient’s ears to often appear pulsatile tinnitus, consistent with the heartbeat and pulse frequency, so it may cause the ear to hear the dripping sound in the head while sleeping. Tinnitus while sleeping may have other causes, it is recommended to go to the hospital for examination first, to clarify the cause of the disease and follow the doctor’s instructions for treatment.