Lymphatic constitution is an idiosyncratic constitution, which belongs to an abnormality of the immune system, and generally can have the following symptoms: First, for example, the main feature of thymic lymphatic constitution is the hypertrophy of the thymus gland and the hyperplasia of the lymphatic tissue in the whole body, and people with thymic lymphatic constitution can die suddenly when they are subjected to minor external stimuli, such as quarrels, emotional excitement, sports, minor diseases, vaccinations, minor surgeries, blood draws, and even during sleep. Nightmares can lead to sudden death in people with thymolymphatic body. Second, not only the thymus gland is enlarged, but also the lymphatic tissue is enlarged, the heart is smaller than normal, the adrenal glands and gonads are underdeveloped, and the secondary sexual characteristics are not obvious. In summary, people with lymphatic constitution are generally thin as well as fragile, and may die suddenly due to sudden death from vaccines, minor surgery, blood tests, etc.