1.Generally healthy people or the elderly Any one of the following two methods can be chosen. (1) Take bifidobacteria preparation (such as Pepcid) 1 to 2 times a day, 2 to 4 capsules each time. (2) Take 1 to 2 times a day of 1.5 grams of hydrosulose or 1 to 2 times of 3 to 4 grams of oligolactose. The above two are no side effects of the intestinal bacterial flora improvement method. 2.Patients with mild habitual constipation (1) take bifidobacterium preparations (such as Pepcid) 2 times a day, 2 to 4 capsules each time (2) or take hydrosugar twice a day, 1.5 grams each time, or oligolactose twice a day, 4 grams each time. 3.Patients with moderate or severe habitual constipation The following preparations are taken once for moderate habitual constipation and twice for severe cost. (1) Take 4 capsules of bifidobacteria preparation (such as Pepcid) each time, and add 1.5 grams of hydrosugar, or 4 grams of oligolactose. (2) Bifidobacterium bifidum preparations to take is Pefikon 4 capsules each time, 1 to 2 times a day (3) Patients with moderate to severe constipation can also choose oats, wheat bran, apples, bananas and other good food fiber in food, which is also beneficial to relieve constipation symptoms. (If necessary, take a good food fiber tablets 2 to 3 times a day, 2 to 3 tablets each time, chew and swallow and drink a lot of water) In addition, moderate exercise is beneficial to restore intestinal peristalsis, enhance the body’s enzyme secretion, and promote food digestion and absorption.