I have a condition where I am stuck in an unending loop of Frequent Urination followed by dehydration and mild headache (around twice a week) and thirst where I have to drink water and then after around 30-60 min I feel urge to urinate. I generally urinate around 10-15 times in 24 hours. Urine is very diluted and light coloured. Fasting and Random blood sugars are within normal range. Hba1c test results are also normal. No other noticeable symptoms are there. What can be the reason and how to investigate the problem further?