It is a relatively long process from the emergence of the first cancer cell in the body to the uncontrollable growth of cancer cells, which then threatens the life. During this period, we are able to detect some traces from the body, and as long as early detection is made, it is possible to kill cancer in the cradle. So what are the symptoms of cancer in early stage? The skin shows abnormalities Many cancers will cause some abnormalities on the skin, such as the skin is easily injured and bleeding, very small wounds and ulcers do not heal for a long time. The inexplicable redness and swelling of the skin in the throat area that does not subside for a long time may indicate throat cancer; the appearance of mixed color of the skin, mixed with red, white, blue, brown and ink-black, and the crusting of the skin for no reason is likely to be skin cancer. It is easiest for us to detect changes in the skin. When taking a bath or changing clothes everyday, we can check our body by the way, and if the skin appears those conditions above, it should be noticed. Appearance of pain without disease Most cancers are fixed in one location in the early stage. When cancer starts to spread and affect other organs, pain will appear. Pain caused by cancer is usually persistent and cannot be relieved by taking painkillers. Pain caused by cancer is usually persistent and cannot be relieved by painkillers. Pain caused by cancer includes the following three types of pain: Somatic pain: pain caused by cancer cells invading muscles or bones, resulting in pain in unclear location and feeling that nothing is right; Visceral pain: pain caused by cancer cells pressing on internal organs, which is manifested as dull pain or cramps in internal organs; Neuropathic pain: pain caused by tumor pressing on nerve tissue, which is manifested as stabbing pain, burning pain or electric shock pain. Neuropathic pain: pain caused by tumor pressing on nerve tissues, manifesting as stabbing pain, burning or electric shock pain. Weight loss inexplicably If we do not eat and drink a lot or lose weight deliberately, then our weight is generally very stable, even if we eat and drink a lot or lose weight, the change of weight is regular and slow. Therefore, when there is a sudden weight loss in a short period of time, you should beware of whether cancer has stolen the nutrients from your body. Common cancers of the digestive tract such as esophageal cancer, stomach cancer and pancreatic cancer can cause sudden weight loss. Therefore, don’t take it seriously when you find your weight suddenly drops for no reason. Unexplained fever Cancer can destroy the immune system and cause fever, which is untraceable, intermittent and usually lasts for a long time. Clinical statistics show that almost all cancers have symptoms of fever. Usually fevers caused by minor illnesses such as colds come and go in a hurry. Therefore, when there is an inexplicable fever that lasts for a longer period of time without remission, then it is time to be alert. It definitely indicates some major problem in your body, even if it is not cancer, it may be other serious illness. Abnormal bleeding It is important to pay attention to any abnormal bleeding in your life. Coughing up blood, vomiting blood and regular bleeding from the nose are symptoms of cancer in the internal organs of the human body, and even if they are not cancer, they are often signs of major diseases and need to be taken seriously. Fatigue that cannot be alleviated For general cancers, fatigue and weakness are usually felt when cancer cells start to spread, but leukemia, intestinal cancer and gastric cancer will feel fatigue significantly at the beginning of the disease. The fatigue caused by cancer is different from ordinary fatigue. Ordinary fatigue will be relieved and disappear with more rest, but the fatigue caused by cancer is difficult to be improved no matter how much rest and recuperation are given. White spots on the oral mucosa, female vulva or male penis that do not heal for a long time, and if the white spots gradually expand and are accompanied by burning and itching sensation, attention should be paid to exclude cancerous changes, especially for long-term smokers. Patients with oral leukoplakia usually have no conscious symptoms, but if pain and ulceration appear, it is often a precursor of deterioration and should be paid great attention. The appearance of lumps and nodules in the body The appearance of lumps, nodules and hard nodes in the body is one of the common manifestations of cancer. Especially if the lumps and nodules are gradually increasing, it is important to pay attention to them, and it is important not to use pain as the basis for seeing a doctor or not. Non-traumatic fracture If the fracture is caused by no obvious external force or slight external force, it is likely to be pathological fracture and should be alerted to skeletal malignant tumor. In adolescents with non-traumatic elbow or knee pain, it is important to be aware of leukemia and to identify the cause as soon as possible.