3. Fever
Developing a fever is the body’s natural response to infections, viruses, and pathogens; it’s the body’s way of trying to turn the body into an environment where pathogens can’t survive – though in response a fever can make one feel absolutely awful, and a fever can also put far too much strain on the body and might even increase your risk of heart failure if your heart is put under too much pressure while you’re sick.
Fever still serves a useful purpose for the body at the same time, and fever can indicate that there is something else wrong with your health that needs to be addressed – and if you experience it together with any of the other symptoms that have been mentioned on this list, you should definitely make an appointment with your doctor so that the proper tests can be ordered. Even when it’s not osteosarcoma, it can still point to a serious condition.