Conclusion
To check for kidney failure, blood tests measuring BUN (Blood urea nitrogen[4]), glomerular filtration rate [5] and creatinine [6] is conducted. When a person has painful and colored urination, is constantly tired and finds it hard to breathe, he/she should go in for a test, to check for the millimeters of waste the kidney is able to filter per minute.
If you notice over half of these symptoms happening to you or someone around you, do well and go to the hospital to see a doctor. The proper tests will be conducted, and depending on the results, the next steps to be taken will be told to you.
Reference：
[1] https://www.healthline.com/health/autoimmune-disorders
[2] https://en.wikipedia.org/wiki/Erythropoietin
[3] https://www.webmd.com/a-to-z-guides/understanding-anemia-basics
[4] https://www.mayoclinic.org/tests-procedures/blood-urea-nitrogen/about/pac-20384821
[5] https://en.wikipedia.org/wiki/Glomerular_filtration_rate
[6] https://www.medicinenet.com/creatinine_blood_test/article.htm