Aging, sickness, or injury can lead to problems in the urinary system. With age, certain changes in the kidneys’ structure may cause them to lose some of their ability to remove wastes from the blood. In addition, the ability of the kidneys to filter blood entirely may be weakened by poor health or injury.
Muscles in your bladder and urethra may be inclined to lessen in strength. Increased urinary infections may occur because the bladder muscles do not tighten enough to completely empty your bladder. Diminished strength in the sphincter and pelvis muscles will in some cases lead to incontinence.