People often talk about cancer, but it is not completely invincible. Prostate cancer false alarm: Many people think that the occurrence of frequent urination, urgent urination, slow urination and incomplete urination is related to prostate cancer. But in fact, this may just be a symptom of prostate enlargement or urethral stricture. Early Signs: The best way to diagnose prostate cancer early is still finger palpation and prostate-specific antigen testing. Finger palpation is one of the main tests that can detect prostate cancer if the prostate is enlarged, hardened, nodular or irregularly shaped. If the prostate-specific antigen is elevated or changes a lot, a prostate cancer biopsy should be performed. Lung cancer false alarm: Many patients diagnosed with lung cancer have a history of “pneumonia” and the early symptoms of both are similar, such as fever, cough, sputum, and shadow on chest X-ray. Early signs: Many people may mistake lung cancer as pneumonia and miss the best treatment time. Therefore, while focusing on symptoms such as coughing, coughing blood and chest pain, pneumonia patients, after 4-6 weeks of treatment, should have another chest X-ray to clarify the condition. This is especially true for patients who have chest pain symptoms without exercise. Colon cancer false alarm: bleeding during bowel movement with bright red blood will stop on its own after the bowel movement and no pain is felt. This is indeed not colon cancer, but a symptom of hemorrhoids. Early signs: It is still important to pay high attention to blood in stool, even if there has been blood in stool once, it should never be ignored. If it is colon cancer, it is often blood in stool mixed with mucus or pus, and the color of this blood is darker than hemorrhoid bleeding, and it is often combined with diarrhea. At this time, colonoscopy must be done in time to detect the problem early and treat it urgently. Bladder cancer false alarm: bladder irritation symptoms or pain in the urethra are likely to be caused by urinary tract infectious diseases. Early signs: blood in urine. Most bladder cancers occur mostly in the mucous membrane lining the bladder and can still be cured if detected early. Lymphoma false alarm: In fact, it is not necessary to be alert to lymphoma whenever lymph nodes appear swollen, as ordinary people think. Swollen lymph nodes in the mouth, nasopharynx, lower extremities and after infection of genital organs are not symptoms of the disease. Early signs: swollen lymph nodes in the neck, armpit or groin without pain. Unexplained weight loss within a month or two and painful lymph nodes after drinking alcohol are important signs to look for. Generally infected lymph node swelling that does not subside within a week should also be examined carefully at the hospital. Blood tests can sometimes reveal some abnormalities, but the most thorough is a biopsy of the lymph nodes. Melanoma false alarm: Brown, hard epidermal seborrheic keratosis patches on the body that usually do not fade on their own are usually benign, with very few malignant changes. Early signs: Skin plaques with malignant qualities will be prominent, change in color, often with jagged, jagged edges, and an unsmooth surface. It is sometimes accompanied by oozing, bleeding, itching and pain.