Exploring the mystery of celebrity death is a work that members of the American Association of Historical Clinical Pathology have been keen on. The exact cause of death of Lenin's premature death has been a topic of speculation for decades. Medical experts even put his brain, heart and bullets left in his body after the assassination into the glass cabinet of the institute for research. Academician Nikolai Semashko, then a member of the Soviet Union's Healthy People's Committee, said in Lenin's death report: "The cause of death is considered to be arteriosclerosis (arteriosclerosis). Anatomy proves that this is the main cause of Lenin's illness and death, just in the carotid artery. " Dr. Harry Winters, a professor of neuropathology at UCLA, and Lev Luri, a Russian historian, believe that the real cause of Lenin's untimely death should be mental stress, family history and even poisoning, not syphilis, which was rumored before, and not just a single cause of stroke. According to historical documents, Lenin was born with a big head. As early as childhood, he had the habit of banging his head on the ground when he was upset. His mother always thought that he might be a developmental problem. As an adult, Lenin suffered from the common diseases of that era: typhoid fever, toothache, flu and skin infection commonly known as erysipelas. He also suffers from insomnia, migraine and abdominal pain due to stress. At the age of 48, he was assassinated and was shot twice. One bullet passed through the lung and stayed in the clavicle, and the other was stuck under his neck. Both bullets accompanied him for the rest of his life. Lenin's father also died at the age of 54, and the cause of death was cerebral hemorrhage after several strokes. Lenin's three brothers and sisters who lived to adulthood all had cardiovascular problems. Lenin may have inherited his father's family history of cardiovascular disease caused by high cholesterol. Lenin may have been poisoned by Stalin 192 1 year, so Lenin told doctors and friends that he was in poor health. Since then, his health has gone from bad to worse. He can't sleep, has a severe headache, can't read, can't write, doesn't want to work, and even forgets his words in big speeches. "I'm so tired, I don't want to do anything at all", "The misfortune of losing the ability to work is showing on me: I'm completely incapable of working", "It's a terrible thing to stay up all night and have to work the next morning …" After the stroke, he had to learn to speak and write with his left hand again. At the end of his life 1 year, he completely lost his language ability. Lenin didn't smoke, and he hated other people's smoking. He drank only occasionally, and he didn't suffer from brain tumors. The autopsy report showed that he didn't have high blood pressure, diabetes and obesity, which were risk factors for atherosclerosis, and he exercised regularly before his death. However, after his death, his autopsy found that his cerebral vessels were "as hard as stones". Dr. Philip Mackowiak of the Historical Clinical Pathology Association said that as a patient under 54 years old, it was hard to understand the degree of cerebral vascular sclerosis. Although sexually transmitted diseases can cause stroke, the anatomical results show that Lenin is not the case. According to the data, Lenin was still laughing and laughing a few hours before his death. That is to say, after the assassination, Lenin suffered a stroke due to family genetic reasons and overwork and mental stress. However, these minor strokes did not cause fatal consequences, and the illness only became serious in the last few days of his life. It is very likely that poisoning is the last straw to crush the camel. Russian historian Luli believes that Lenin may have been poisoned by Stalin, and Professor Winters also recognizes the existence of this possibility.