<s>[INST] All of a sudden my serum creatinine level shot up to : 1.5 it was not so earlier. Before during bi- monthly test it was only 1.1, 0.9 . I repeated the test it also showed 1.6. Why so. My fasting & pp sugar level is under control thro` tablet & insulin [/INST] Hi, dear. I have gone through your question. I can understand your concern. You may have some kidney disease or it may be due to some muscular disease.  You should go for complete kidney function test. Then you should take treatment accordingly. Thanks for using health care magic. Wish you a very good health. </s>