Since graduating from university, he has been practicing major internal medicine diseases. I have been focusing on hematology and rheumatology for 16-17 years. Because my department is a hematology and rheumatology department, my friends and patients often ask me if hematology and rheumatology are the same thing. Even in lectures, I have to cover this issue. This is because in our undergraduate teaching, our department has the task of teaching a part of rheumatology in addition to hematology. In the process of communicating with scholars in China, we found that the hematology and rheumatology departments in many hospitals in China are also together. As we all know, hematology and rheumatology are diseases belonging to two systems. In more than ten years of work, it is deeply felt that although they belong to two systems, they have common characteristics: on the one hand, they are both systemic diseases, and many clinical symptoms lack specificity. The same disease can have different symptoms, and different diseases can have the same manifestation; secondly, the specialty is strong, and inexperienced doctors lack systematic understanding of such diseases, which can easily lead to misdiagnosis and omission in clinical practice. For example, acute leukemia and multiple myeloma are very easy to diagnose for hematologists (of course, some typing is more complicated). But why do most patients experience misdiagnosis before coming to the hospital? The key is “not expecting”. The characteristics of hematologic diseases are such that diagnosis must rely on laboratory tests. If you don’t think about it, you won’t propose relevant tests, and if you don’t do blood work, bone marrow work and other related tests, you certainly won’t be able to come up with a correct diagnosis. And rheumatology, most scholars called the difficult disease department. In general, hospitals do not have a special rheumatology department. Before patients come to the clinic, most of them have been treated by many hospitals and doctors (including some individual doctors), and only after they arrive at a regular hospital can they arrive at a clear diagnosis. The work of our department is characterized by inpatients, who are mainly hematologists, while rheumatism accounts for a large proportion of outpatients (although it has not been long since our rheumatology department’s sign was put up). The number of rheumatology patients tends to increase as time goes by. From my personal work experience, I have focused mostly on the treatment of hematological diseases in the previous years. With the development of rheumatology and the increase of academic activities in rheumatology, the interest in rheumatology has grown. The number of patients seen is also increasing, and the number of patients who come to us by name is also increasing. In the clinical work, the relevant knowledge is also being updated. Although blood diseases and rheumatism are not a system of diseases, they are somewhat related. Because in our hospital, they belong to a department of diagnosis and treatment, when I give lectures to students, I often love to say that routine examination must be performed routinely. In the daily treatment work, don’t forget the routine blood, urine routine, blood sedimentation, blood biochemistry and other routine tests. In addition, if there are many abnormalities in a patient’s labs that cannot be explained by one disease, you should think if it is a systemic disease, which includes blood diseases and rheumatic diseases. If our doctors are a little more careful, noting the relevant symptoms and signs during history taking and physical examination, and suggesting the corresponding examination items, we can arrive at the correct diagnosis and reduce clinical misdiagnosis and omission.