As I mentioned before, BUN or blood urea nitrogen can be elevated due to high protein intake, inadequate fluid intake or poor circulation. If the BUN is elevated from dehydration, usually the creatinine, will be normal or even low on the same test. And if the BUN to creatinine ratio is high, it usually indicates dehydration. As your creatinine level is normal, and your BUN and BUN to creatinine ratio are high, the most probable cause is dehydration. So, drink adequate fluids and rec check your values.
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