36 year old presented to ED complaining of limbs pain. His cumulative electrolytes tests showed the following:

Na = 140 mmol/L

K = 4.6 mmol/L

Cl = 109 mmol/L

HCO3 = 19 mmol/L

Urea = 11.2 mmol/L

Creatinine = 696 umol/L

 Questions:

1.  explain these findings?
2. What are the potential causes?
3. How will you manage this condition