Overactive Bladder: This condition is characterized by a sudden, intense urge to urinate, sometimes accompanied by unintentional urination. It's a common cause of urinary incontinence in teenagers due to its prevalence and the fact that it can be triggered by various factors including stress, certain foods, and drinks.

Stress Urinary Incontinence: Although more common in women who have given birth, stress urinary incontinence can occur in teenagers, especially those involved in high-impact sports or activities that increase abdominal pressure.
Urinary Tract Infections (UTIs): UTIs can cause symptoms of urgency, frequency, and incontinence. Teenagers, especially females, are prone to UTIs due to their anatomy.
Neurogenic Bladder: Conditions affecting the nerves controlling the bladder can lead to incontinence. While less common, it's a consideration, especially if there's a history of neurological conditions or spinal cord injuries.

Diabetes Mellitus: Uncontrolled diabetes can lead to polyuria (excessive urine production) and subsequent incontinence. Missing this diagnosis could lead to serious complications if left untreated.
Spinal Cord Injury or Tumor: Any condition affecting the spinal cord can impact bladder control. Early detection is crucial for appropriate management and prevention of further neurological damage.
Ectopic Ureter: A rare congenital anomaly where the ureter opens at a location other than the bladder, potentially causing continuous incontinence. It's essential to diagnose and treat this condition to prevent long-term kidney damage.

Bladder Exstrophy: A rare congenital condition where the bladder is open and turned inside out. It's usually diagnosed at birth but can be considered in cases of unexplained incontinence if not previously identified.
Interstitial Cystitis: A condition causing bladder pressure, bladder pain, and sometimes pelvic pain. The symptoms can overlap with overactive bladder, but it's less common in teenagers.
Congenital Neurological Disorders: Conditions like spina bifida can affect bladder control. While often diagnosed in infancy, some milder forms might not be identified until later in childhood or adolescence.