<s>[INST] Hi I had a fasting blood test and today I got a letter saying that I had to have another one in a month for comparison but it does say what. I went to the doctor because I was feeling tied all the time and I had a shape pain going from my right groin to my kidney what do you think could of shown up and should they of told me on the letter Thank you for your time sam [/INST] Hello Angel, Thanks for posting, Well I do not personally understand why your test results should be hidden from you and only ask to be redone after 1 month. Fasting blood tests could be done when testing for sugar, cholesterol, uric acid and other diet dependent tests. It is mostly done for glycemia (to determine if diabetic or not). If you had groin pain radiating to the kidneys, I personally would have requested for a urine analysis, abdominal scan (especially looking at the kidneys + bladders + ureters etc). Usually when results are asked to be done after it is for a confirmation of a test conducted earlier. Usually after a while if a test value was high or positive, after a while it could normalize or become negative. Surely that is why they ask to do it again after a month. Hope this helps </s>