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.
A number of symptoms may indicate a problem with your kidneys. These include. 1  high blood pressure. 2  blood in urine. 3  frequent urges to urinate. 4  difficulty beginning urination. 5  painful urination. 6  swelling in the hands and feet due to a buildup of fluids in the body.