Common complications of urinary incontinence in females include:
Skin complications
Perineal irritation, dermatitis, rash
Maceration and skin breakdown from chronic moisture
Secondary fungal or bacterial skin infection
Urinary tract complications
Recurrent urinary tract infections (UTIs), especially with incomplete emptying or prolonged pad use
Worsening urgency/frequency cycle in some patients
Pelvic and lower urinary tract effects
Associated pelvic organ prolapse can coexist and worsen symptoms
Sleep disturbance from nocturia and nighttime leakage
Falls and physical injury
Increased fall risk, especially in older women rushing to toilet (urge incontinence), often at night
Possible fractures or mobility decline after falls
Psychological complications
Anxiety, embarrassment, low self-esteem
Depressive symptoms
Sexual dysfunction and avoidance of intimacy
Social and functional complications
Social withdrawal and isolation
Reduced work productivity and limitation of daily activities/travel
Institutionalization risk in frail elderly
Quality of life and economic burden
Significant quality-of-life impairment
Ongoing cost of pads, laundry, medications, and caregiving needs
If you want, I can also break these down by incontinence type (stress, urge, mixed, overflow, functional) and list which complications are most likely with each.
Risk factors for overactive bladder syndrome
Risk factors for overactive bladder (OAB) syndrome include:
Increasing age (prevalence rises with age)
Female sex (especially postmenopausal changes), though men are also affected
Obesity (higher intra-abdominal pressure and pelvic floor strain)
Parity and vaginal childbirth (pelvic floor/nerve injury risk)
Pelvic surgery (eg, hysterectomy, anti-incontinence procedures in some cases)