When the pulse beats more than 100 times and is pressed like a thin line, it is called a fine pulse. Fine pulse is mainly caused by tachycardia, fine is the concept in Chinese medicine, fine pulse main qi and blood deficiency, all deficiencies and labor losses. Due to various diseases and qi deficiency is unable to push the blood to run, blood deficiency can not fill the pulse channel, the pulse body is small and weak. Dampness that blocks the pulse pathway can also be seen as a thin pulse. Tachycardia caused by the prevention and relief methods of the pulse fine speed: 1, breathing breath holding method is instructed to inhale deeply and then hold the breath until you can not insist on holding the breath, and then exhale with force. 2.Stimulate the throat method Stimulate the throat with fingers or tongue depressor to cause nausea and vomiting, which can play a role in terminating the attack. 3, compression of the eyeball method Close your eyes and look down, use your fingers to compress the upper part of the eyeball under the orbit, starting with the right eye. At the same time take a pulse to count the heart rate, once the tachycardia stops, immediately stop compression, do not use excessive force. Each time 15 seconds, compression of one side is not effective and then change the opposite side, do not press both sides at the same time. At the same time, take oral medication or medication tablets. Note: glaucoma, highly myopic eyes this method is contraindicated. 4, compression of the carotid sinus method The patient is in a lying position, family members to help compress one side of the carotid sinus (at the level of the thyroid cartilage, carotid pulsation pressure to the cervical vertebrae), each time 10 to 20 seconds, when invalid, change to the other side. The compression should be done gently and not with excessive force, while the pulse should be felt to monitor the heart rate. If it is found that the heart rate suddenly becomes regular and normal, compression should be stopped immediately. Compression should not be done on both sides simultaneously to avoid significant ischemia in the brain. Note: Previous history of carotid allergy and history of cerebrovascular disease prohibit this method. 5, diving reflex method can strongly excite the vagus nerve, more effective for small infants. The method is to use about 5 ℃ of ice water soaked towel or ice water bag compress the entire face, each time 10 to 15 seconds, an invalid can try again every 3 to 5 minutes. Adults can be seated, the front table put a pot of cold water below 5 ℃, the patient is asked to inhale deeply and then hold his breath, immediately dip the face into the cold water for about 30 seconds. The method can be repeated after a few minutes of rest if it does not work. This method is often effective in adults with paroxysmal supraventricular tachycardia that cannot be easily controlled.