Thanks for posting your query.
Your treating doctor is right...your patient is already suffering from diabetes and hyperkalemia
(increased potassium) is very common in renal failure
Your patient is unconscious and has gum & feet bleeding, there may be high chances of intracranial bleed making patient unconscious.
You should go for CT/ MRI brain to rule out bleed.
You should also go for bleeding time
, clotting time, prothrombin time
to clarify the cause.
Yes, your patient is serious and bleeding is not a good sign.
You should also go for liver function test, renal function test, complete blood count
You patient needs intensive care.
Dr. Mayank Bhargava