I have low potassium (3.2.). i don't have diabetes, kidney disease, diarrhea, or vomiting. i don't have a low magnesium level. i don't use diuretics. what could be the cause of my low potassium?

Hypokalemia: for better diagnosis a complete history is required, urine sample of potassium can help to identify possible causes but history and physical will aid accurate diagnosis . it can range from hereditary diseases, medications side effect, diet, thyroid, etc. Diagnosis can be simple with Good history, physical exam and some basic test. Go visit your doctor and if required visit a kidney doctor.

You're OK-K-K-K-K: You are slightly to one side of the bell-shaped curve but not so far that it should concern you,at least for now. Find foods with more potassium in them if you want (easy to find on-line).It's not so bad you need potassium supplements(pills).If you feel OK then I wouldn't worry. As they say,"no-body's perfect"-I'm sure your doctor has thought of the obscure causes of "Low K."If you feel good,chill

Likely is V could be: Familiarizing oneself with common & ruling them out by yourself is very helpful & makes a healthcare experience better so I appreciate this self-rule out. What this could be is far too broad of a list. What this is likely to be is physiologic normal either with a discernible cause like sweating or without cause. See a doctor for palpitations, muscle weakness, fatigue or numbness.

Low k: hypokalemia is shift inside cells, increased losses either Gut or kidney and low intake with some loses. Based on your info you need a full exam and a urine study to assess for losses by the kidney. Also what is your BP and serum bicarbonate (sodium bicarbonate). This information offers clues. Suggest see a kidney doc for work up. All this is assuming all your labs were repeated and low k was persistent.

3.2: Yes the potassium level is a bit low but not enough to cause you any trouble. When the potassium is remeasured in a few months the level may well be normal.

Rule out....: It will be worth checking perhaps a spot aldosterone; it would be embarrassing to miss an aldosteronoma even if it has not made you hypertensive yet. Some folks' kidney tubules just aren't as good as other folks at reabsorbing potassium. How much of a workup you want for a non-life-threatening minimal lab anomaly is up to you and your physician. Best wishes.