Early detection of cancer plays a crucial role in treatment and prognosis, so what should you do? And how to do it? Here are a few tips to learn from. 1. Insist on touching your neck, armpit and groin at least once a month to check whether there are enlarged lymph nodes. Observe how the texture of the enlarged lymph nodes is, whether they are fixed, and whether there is any pressure pain. 2.When coughing for a long time, pay attention to whether there is blood mixed with the coughing sputum, the time of coughing, the site of chest pain, the amount of blood, and the color of the blood, etc. 3.When there is loss of appetite and wasting, epigastric pain, and accompanied by nausea and vomiting, pay attention to whether there are black-brown contents in the vomit, pay attention to whether the stool is tarry or with or without blood, and whether the shape of the stool has changed. 4. 1 week after menstruation, women should look in the mirror to see if there is a lump in their breast, and if so, to see how hard and mobile the lump is, whether it is adherent to the skin, and whether there are enlarged lymph nodes in the armpit on the same side of the breast with the lump. 5. Whether there is any change in the habits of stool and urine, especially pay attention to whether there is any pain and a feeling of falling during stool and whether there is any change in the shape of stool. When urinating, observe whether there is a shortening of the stroke, whether there is white discharge, whether there is hematuria, whether there is discomfort in the perineum, etc. 6. In case of long-term hoarseness, look at the mirror, open your mouth to breathe and observe whether there is any swelling in the pharynx. 7.In case of long-term unexplained fever, attention should be paid to the measurement of body temperature and, if necessary, routine blood and urine tests. 8.Men should pay attention to whether the foreskin of the penis is too long, whether there are ulcerated nodules at the urethra, and whether there are cauliflower-like swellings in the coronal groove that are prone to bleeding. Women should pay attention to whether the leucorrhea is mixed with bloody secretions and whether the leucorrhea has a fishy odor. 9.When pain in the limbs occurs after strenuous activity and activity is limited, attention should be paid to whether there are lumps in the joints of the limbs and whether swellings can be touched at the skin. If a painless lump is found in the bone area, go to the hospital for further examination. 10. Keep an eye on the changes of moles on various parts of the body surface, and pay attention to whether they grow rapidly and break down within a short period of time. Also pay attention to the presence of ulcers on the surface of the body that do not heal for a long time. 11.Often observe the slight changes of your body in life, conduct self-examination at any time and care for your health, so that cancer will not have a chance to take advantage of it.