Lactobacillus low is related to acute enteritis, antibiotic abuse, age and other factors. Lactobacillus belongs to the intestinal beneficial bacteria, which can improve the immunity of the intestine and promote the absorption of nutrients in the intestine. Some people have low Lactobacillus, due to acute enteritis attack, during acute enteritis attack, due to the presence of inflammation in the intestine, so it will lead to intestinal flora imbalance, when the harmful bacteria prevail, will inhibit the reproduction of beneficial bacteria, resulting in a relative lack of beneficial bacteria, resulting in low Lactobacillus. Although antibiotics can kill harmful bacteria, they can also kill some beneficial bacteria, so the long-term use of large doses of antibiotics will lead to the reduction of lactobacilli. The balance of intestinal flora is also related to age, with the growth of age, the balance of intestinal flora will change, some people will be because of the body immune system decline, weak, poor nutrition and other factors, will also lead to the relative lack of beneficial bacteria in the intestine, so there will be less lactobacillus.