Urodynamic testing looks at how well the bladder, sphincters, and urethra are storing and releasing urine. Most urodynamic tests focus on the bladder’s ability to hold urine and empty steadily and completely. Urodynamic tests can also show whether the bladder is having involuntary contractions that cause urine leakage. Your doctor may recommend urodynamic tests if symptoms suggest problems with the lower urinary tract including urine leakage, frequent or painful urination, sudden, strong urges to urinate, problems starting a urine stream or emptying the bladder completely, recurrent urinary tract infections.