Increased Urination - Differential Diagnosis Framework - Increased Volume / Frequency

 • Increased osmotic load (Increased urine osm): Diabetes Mellitus / Hyperglycemia, Other solute load (Na, urea, mannitol), Chronic kidney disease, Thiazides

 • Physiologic Diuresis: Post-obstructive diuresis

 • Inability of kidneys to concentrate urine (usually low urine osm or Isosthenuria): Chronic kidney disease, Loop Diuretics, Recovery phase of ATN, Hypercalcemia, ADH deficiency/resistance (Diabetes insipidus)

 • Increased intake (low urine osm): Primary Polydipsia

 • Irritation/Inflammation: Urinary tract infection, Prostatitis, Interstitial cystitis, Urge incontinence, Bladder calculi, Bladder cancer

 • Incomplete Bladder Voiding: BPH, Neurogenic bladder

 • Decreased Pelvic Muscle Tone: Stress incontinence



Dr. Ann Marie Kumfer @AnnKumfer



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