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Your bladder holds urine until you find the right time and place to get rid of it. The pee flows there from your kidneys, which filter waste and harmful chemicals from your blood and turn them into urine.Your bladder can hold about 4 cups of pee. When it’s full, nerve endings there send signals to your brain. When you’re ready to go, the bladder walls tighten and a valve-like muscle opens to let the liquid out. This is when you pee when you don’t want to. It may happen when you cough or laugh, or you may just feel a sudden, strong urge to go. Some things you eat or drink can cause it, as can constipation, pregnancy, or childbirth. A health problem like an infection or enlarged prostate can, too. Depending on what’s behind it, it might go away on its own. If it doesn’t, your doctor might suggest changes to your diet, specific exercises, medication, special devices, or surgery.The urge to pee usually comes on gradually, as your bladder fills. With this condition, ...