Cluster headache is one of the types of primary headache, or functional headache. Its clinical frequency of occurrence is actually relatively high, just after tension headache and migraine, accounting for the third highest incidence of clinical headache. However, because there are limitations in the understanding of this disease, patients often think they are suffering from migraine, and it is also difficult for some clinicians to identify it at a glance if they have seen less of this headache. The characteristic of this kind of headache is that it is recurrent and usually takes about two weeks for an attack to end, and it is almost daily and violent in nature, which affects the patient greatly. In this section, we will introduce the characteristics of cluster headache. First of all, why is it called cluster headache? Cluster is called “cluster” in English, which means “cluster” in Chinese. It is like looking at the flowers on the roadside, one cluster after another. The reason for this name is that cluster headache is characterized by the fact that once the attack starts, it is a dense, repeated attack in the form of clumps and clusters. For example, after an attack starts today, it may occur twice to three times a day, and for several days in a row. They may last for three to five days, or two weeks or longer, and then suddenly the attacks stop. After each episode, or cluster of episodes, there is often an inter-episode period during which the patient is as normal, with no pain symptoms. This inter-episode period can be months, years, or even up to 10 years, but usually the patient will have another attack in 1 to 2 years. Therefore, cluster headache attacks are a “cluster” of attacks, unlike any other headache attack. In a cluster headache attack, the patient often has severe pain on one side of the head, which can be either a sharp pain, or a swelling, or a dull pain. A characteristic symptom of cluster headache is the presence of redness of the conjunctiva, reluctance to open the eyes, photophobia and tearing of the eyes on the affected side of the headache. Because of the intensity and duration of cluster headache attacks, patients often feel that their quality of life is greatly affected. Seven out of ten of our patients coincidentally describe this headache as “worse than death”, so you can imagine how much this pain affects the patient. Most patients also suffer from emotional problems such as anxiety, depression, sleep disorders, etc. because of the recurring pain attacks, so we say that cluster headache is a demon that visits from time to time. Once it strikes, it becomes a waterfall reaction, and it will definitely take some time before it gets better. In terms of the treatment of cluster headache, because the pathogenesis of cluster headache is still not very clear, it is an idiopathic disease in general, so there is no special medicine. Often, during the attack period, patients can only take pain medication, which is a symptomatic treatment method. So is it true that there are no specific medications and patients can only endure these repeated episodes of severe pain? At this time we have to reflect the advantages of Chinese medicine and treat this kind of headache from the dialectical point of view. In the clinical observation of a certain number of cases, we found that acupuncture treatment for cluster headache has a pain-relieving effect in the acute stage and shortens the duration of attacks. The second is that acupuncture treatment has a preventive effect in the inter-episode period of cluster headache. Usually we recommend that during the inter-episode period, for example, if a patient used to have an attack about once a year, you can have acupuncture treatment twice to four times a month during that year for preventive treatment. We have observed that most patients have significantly longer inter-episode periods, and even if they have an episode, the pain level is significantly reduced compared to the peak of its severity. Therefore, acupuncture treatment is very meaningful for both acute pain relief and chronic preventive treatment of cluster headache. We briefly describe the acupuncture treatment for the acute phase of the attack. Because the patient usually has symptoms of red conjunctiva and tearing eyes, at the same time, you can see that the frontal horn vein on the side of the headache can have obvious anger, reflecting a school of heat. At this time, we can use the bloodletting method to clear the heat and brighten the eyes, dredge the meridians and relieve the pain. Usually a single bloodletting can relieve the patient’s pain, and after continuous treatment the course of the disease can be significantly shortened. At the same time, it can also be combined with Chinese herbal medicine to clear heat, dredge the liver, and ease the pain. This comprehensive treatment is very effective. Therefore, we say that cluster headache does not need to be tolerated, and we can completely control its attacks by using traditional Chinese medicine.