Hello,
Without examination confirmation of a diagnosis is tough but frequent urination(polyuria) can be due to diabetes mellitus. Other possibilities are
diabetes insipidus, glomerulonephritis, pyelonephritis(inflammation of the kidneys),urinary tract infection, hypercalcemia, hypokalemia(low potassium),hyperthyroidism, hyperparathyroidism and diuretic drugs. Also UTI’s need to be evaluated. For this is suggest you to consult a physician and get urine culture done. I hope it helps.