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[|Human|] My nephew has a blister on one of his kidneys.  The doctor says it will go away on its on but he is in a lot of pain.  He has also been on dialysis for 4 days because of kidney failure.  What is this blister and what could have caused it.  They have also done a biopsy of the kidney and we should have the results of this by Thursday.
[|AI|]  Hi, Thanks for consulting Chat Doctor ! Blister on kidney is a common man term used in different conditions of kidney. We can comment on your issue more after the biopsy results are out. Cysts on kidney can sometimes be benign and may be that is the reason your doctor might have said not to worry. Causes for this can be genetic or even sometimes unknown. Physical examination is mandatory to assess this. You can contact us again after biopsy results are out. Let me know if you have any clarifications. If you like my answers and wish me to answer in the future, bring it to my attention: Chat Doctor.  URL link is as follows:http://doctor.ChatDoctor .com/doctors/