My urea nitrogen is 67.53mg/dl. what is cause , effect and remedy for this?

That is high...: BUN at 67.53 mg/dl alone indicates something wrong in the function of kidney because it's uncommon to raise to this level from dehydration or internal bleeding or excessive nitrogen intake. So, look into serum creatinine, electrolytes, etc. so to correlate with overall clinical pictures and deduce the realistic clinical significance. Hence, see & ask Doc for detail and specifics. Best wish ...