What to do if i have frequent urination - blood test?

That depends on: The circumstances. The list of possible explanations is large, but the individual case (meaning a person's age, gender, medical history, etc.) can make the list much smaller. Then the test(s) to do and not do become clear. The most common, simple first test is the story told about the issue. The second, is a simple urinalysis plus or minus an in office urine dipstick test. Hope that helps!See a MD