Please tell me what causes loss of bladder control?

Incontinence: There are 3 types: stress, urge, overflow incontinence. Stress incontinence is due to loss of bladder support from pregnancy, aging, hormonal deficiency. Urge incontinence is due over activity of the bladder muscle, usually of unknown cause, and overflow incontinence caused by urinary obstruction, or neurogenic bladder that cause urine retention.