How long does constipation last? The answer to this question lies captive in the cause of the constipation. When constipation is just something that happens after a party, then it should be over within a day or to. But if it was cause by an incorrect lifestyle, then it can last for years, even the rest of your life, if you do not have it treated correctly and change your lifestyle. For more about “How long does constipation last, click here.