In osteosarcoma, early and proper diagnosis is the key to proper treatment and successful outcome. Most osteosarcomas occur and grow on the surface of the body or in areas that can be easily detected by examination. Early detection is easy only if you learn how to check yourself. In any disease, there are always certain signs that precede the onset of the disease. If you understand these signs, you can grasp the pattern and characteristics of the disease, and it is possible to detect and treat the disease early, thus increasing the cure rate. What are the common signs of osteosarcoma? Unexplained pain in the limb, which is deep, intermittent at first, then gradually worsens and becomes persistent; pain in the limb after trauma, and the symptoms are worse instead of lighter for a long time; pain in the limb at night than during the day; long-term unexplained fever; swelling soon after the pain, increased local skin temperature and redness of blood. If you have any of these suspicious signs, you should not take them lightly. You should go to the hospital and undergo the necessary tests in order to avoid any delays and lifelong regrets.