The manifestation of malignant tumor is divided into three aspects: local manifestation, systemic symptoms and systemic dysfunction. 1.Local manifestation masses can be found on the body surface or get swelling in the deep part, also can see the enlargement of organs (such as liver, thyroid) or lymph nodes. Malignant tumors generally grow faster, have uneven surface and are not easy to push. Compression If intracranial tumors compress the brain parenchyma causing increased intracranial pressure, it may cause headache, nausea, vomiting and visual disturbance. Tumor of thyroid gland can press the laryngeal nerve and cause hoarseness. If it compresses trachea or esophagus, it may cause difficulty in breathing or swallowing. Mediastinal tumor compresses superior vena cava and causes swelling of head and neck, shortness of breath, superficial venous anger and other superior vena cava syndrome. Sympathetic nerve compression by apical lung tumor causes Rayna’s syndrome. Retroperitoneal mass compresses ureter, causing difficulty in urination and pelvic effusion, and compression of intestinal canal causes intestinal obstruction, etc. Intraspinal tumors compressing the spinal cord causing paraplegia. Obstruction Obstructive symptoms often occur in cavity organs, such as bronchial tumor causing dyspnea, esophageal tumor causing dysphagia, large and small intestine tumor causing intestinal obstruction, bile duct and pancreatic head tumor causing yellow bile, etc. Pain The causes of tumors causing pain are different, thus the early and late occurrence of pain and its nature are also different. Some tumors of nerve origin and fast-growing tumors such as osteosarcoma often cause pain at an early stage, while some tumors cause pain at a later stage due to tension of envelope, organ rupture, tumor metastasis or compression of infiltrated nerves. The pain caused by tumor is mostly vague or dull pain at first, which is obvious at night, and then gradually worsens and becomes unbearable day and night, and the painful area is often accompanied by obvious tenderness. Ulcer is formed by necrosis of tumor tissue, crater-like or cauliflower-like, not necessarily painful, sometimes there is foul-smelling bloody discharge on the surface due to concurrent infection, which may be accompanied by pain in the ulcer. Bleeding Tumor rupture or invasion of blood vessels may cause bleeding. If the tumor is on the surface of the body, bleeding can be found directly. If the tumor is in the body, bleeding can be manifested as bloody sputum, mucus and blood stool or bloody leucorrhea. If the tumor is in the body, the bleeding may manifest as blood sputum, mucus and blood in stool or bloody leucorrhea. And repeatedly. Other tumors such as bone tumor can lead to pathological fracture, lung cancer can cause pleural fluid; liver cancer can cause ascites. 2. Systemic symptoms: weakness and emaciation Due to the rapid growth of tumor and high energy consumption, coupled with the decrease of patient’s food intake and poor digestion and absorption. Fever Due to insufficient blood supply of tumor, necrosis or combined infection, tumor patients often have fever. Anemia Caused by repeated bleeding of tumor, hematopoietic disorder or malabsorption of hematopoietic substances. Cachexia (cachexia) is a manifestation of systemic failure that appears in the late stage of tumor patients. 3. Systemic dysfunction refers to the disorder of organ system and physiological function caused by tumor tissue. For example, in addition to headache, intracranial tumor can also cause visual impairment, facial palsy, hemiparesis and other neurological symptoms; in addition to hepatomegaly or pain in liver area, hepatocellular carcinoma can also cause loss of appetite, abdominal tent and other gastrointestinal dysfunction; functional endocrine tumors such as islet tumor, pheochromocytoma and parathyroid adenoma can cause corresponding endocrine abnormal symptoms. Even if they appear, the early and late symptoms and their degree vary from person to person.