Probiotics can be taken before meals or after meals, both can treat constipation. Probiotics belong to the active flora, through taking, act on the gastrointestinal tract, so that the intestinal disorder of the flora to restore normal, replenish the missing flora, so that it restores the normal ratio, so as to regulate the intestinal tract, so that it is normal peristalsis, to alleviate the occurrence of constipation. Generally, no matter whether it is eaten before or after meals, it can regulate the intestinal flora imbalance and treat constipation. If the patient suffers from gastritis, gastric ulcer and other digestive diseases, it is mostly recommended to take it before meals, if the patient does not have the above diseases, it can be taken before or after meals. However, before applying probiotics, patients must consult a physician and take medication under the guidance of the physician, and must not choose their own medication for treatment.