Medical causes of fatigue Some common causes of fatigue include: 1  Anemia â When you have low red blood cell counts in your bloodstream, your body has to work harder to deliver oxygen to your cells, causing fatigue.2  Iron deficiency is also associated with fatigue. Anemia â When you have low red blood cell counts in your bloodstream, your body has to work harder to deliver oxygen to your cells, causing fatigue. 2  Iron deficiency is also associated with fatigue. 3  If you're diagnosed with anemia, then it's important to understand the cause in order to correct the problem.
Occasionally, a health practitioner will look at the ratio between a person's BUN and blood creatinine to help determine what is causing these concentrations to be higher than normal. The ratio of BUN to creatinine is usually between 10:1 and 20:1.An increased ratio may be due to a condition that causes a decrease in the flow of blood to the kidneys, such as congestive heart failure or dehydration.ccasionally, a health practitioner will look at the ratio between a person's BUN and blood creatinine to help determine what is causing these concentrations to be higher than normal. The ratio of BUN to creatinine is usually between 10:1 and 20:1.
BUN Creatinine Ratio can help a physician to decide what has caused your renal failure or if you have renal failure at all. This generally is only helpful if you do not already have chronic renal failure, and are just having an acute episode of renal disease. Normal BUN:Creatinine ratios are 10:1 to 20:1.ou could have a high BUN Creatinine Ratio and not have any symptoms at all. If you do have renal failure, and both your BUN and Creatinine are elevated, you may have the following symptoms: - Less urination-Blood in the urine-Swelling in the extremities-Vomiting-Weakness-Confusion-Seizures.