The formation of tumor needs a process. Most tumor patients will show some symptoms or signs in the early stage, which are important clues for early diagnosis of tumor even if they are not obvious. For these early signs, they should be found in time and cause high vigilance. So what are the early signs that tumors often have? (1) Lumps. A palpable lump appears on any part of the body such as skin, neck, breast, abdomen, bone, etc. It can be large or small, multiple or single, and the skin color is as usual, not painful or itchy. (2) The sudden change of moles and warts. Sudden enlargement, color deepening, oozing, ulceration, hair loss, bleeding or roughness of moles and warts. (3) Ulcers that do not heal. Ulcers that occur on the skin and mucous membranes do not heal over a long period of time. (4) Cough and bloody sputum. Unexplained cough and blood in sputum do not improve with treatment, or they may be offended at times, and may be accompanied by mild chest pain. (5) Poor feeding. There is a feeling of foreign body or obstruction in the esophagus when swallowing, especially when the first swallow is obvious, or the pain behind the sternum is stuffy, and this symptom has the tendency to get worse day by day. (6) Loss of appetite, epigastric discomfort, dullness or irregular pain in the upper abdomen after eating. (7) Blood in the stool. Unexplained blood in the stool, black stool; accompanied by changes in stool habits, alternating constipation and diarrhea. (8) Painless hematuria and dyspareunia. Blood is found in the urine during urination, and painless urination may be accompanied by dyspareunia and dyspareunia. (9) Nasal congestion, nosebleeds, and nasal discharge with blood. Unilateral nasal congestion, blood in the snot, may be accompanied by headache, tinnitus, hearing loss. (10) Increased leucorrhea and abnormal bleeding. Middle-aged women, especially around menopause, suddenly have increased leucorrhea, bloody discharge or irregular vaginal bleeding. (11) Prolonged low fever. Unexplained prolonged fever, excluding infection, and ineffective treatment. (12) Fatigue and emaciation. Unexplained physical weakness, fatigue or significant weight loss in a short period of time. The above symptoms may be the early manifestation of some malignant tumors, or they may be caused by other common diseases, but no matter what, you should be alert and go to the hospital for examination as soon as you find them.