Hello,
That level of microalbuminuria could be due to tubular injury/dysfunction or low-grade glomerular injury on account of your background of hypertension. Fortunately, that is a very small level of albuminuria which can easily be managed with blood pressure control and use of angiotensin receptor blocker (like candesartan) and possibly even an SGLT2 inhibitors. It was very reasonable to hold his medication while you experienced an AKI episode however. Following its resolution, in general, the ARB could safely be restarted to manage your blood pressure provided the creatinine remains stable when doing so. We generally hold ARBs such as candesartan during acute illness as they are considered a "sick day medication". Thyroid disturbance usually does not contribute to proteinuria.
I can only base my opinion on the information provided and your health-care provider might arrive at different conclusions once you have provided an entire history and had a physical examination performed. As always, this forum provides general medical information only and is limited to educational use only. Please discuss the above remarks with your health-care provider.
Dr. Jordan Weinstein, MD
Division of Nephrology, St. Michael's Hospital
Associate Professor of Medicine
University of Toronto