More. 1  Oxygen Levels and Brain Function The brain consumes about 25 percent of a personâs oxygen intake, so proper brain function requires enough blood oxygen. 2  How Oxygen Affects the Heart The heart is a key player in making sure oxygenated blood travels to the organs and tissues that need it.
Other possible kidney cancer symptoms may include: 1  Persistent pain in the side of the abdomen or the back, which is not the result of an injury. 2  A mass or lump in the abdomen. 3  Feeling fatigued.  Unexplained, sometimes rapid, weight 1  loss. A fever that is not due to an illness.
Symptoms of kidney disease. In the early stages of kidney disease, people can have no symptoms. In fact, some people have no symptoms until over 90 per cent of their kidney function has gone. This is unfortunate because early detection of kidney disease and treatment is the key to preventing kidney failure. pain in the kidney area.