Probiotics include lactobacillus, probiotics is the general term for the flora that are beneficial to human health, and lactobacillus is the collective name for gram-positive bacteria that can ferment glucose or lactose into lactic acid, which is one of the important flora in the intestinal tract. Probiotics is the collective name of all beneficial bacteria, including lactobacilli as well as other strains of bacteria.1. Probiotics: including lactobacilli, bifidobacteria, yeast, bacillus, etc., can help improve patients’ diarrhea by regulating the balance of intestinal flora and intestinal function, as well as softening stools and relieving constipation symptoms by producing organic acids, lowering pH in the intestinal lumen, promoting intestinal peristalsis and increasing intestinal osmotic pressure. In addition, probiotic preparations are often used in clinical practice to treat irritable bowel syndrome, Helicobacter pylori infection, inflammatory bowel disease, etc.; 2. Lactobacilli: as important probiotics for human body, mainly including Lactobacillus species and Lactococcus species, they also help to inhibit the growth of pathogenic bacteria, regulate immune function, promote the production of active substances, and protect the intestine. However, lactobacilli alone cannot accomplish the role of regulating the balance of flora and lowering the pH value in the intestinal lumen. In addition, Lactobacillus, one of the categories of lactic acid bacteria, as a very important and abundant flora of the vagina, can maintain the acidic environment of the vagina, inhibit the reproduction of bacteria, and play the role of vaginal self-cleaning. In daily life, if you want to supplement probiotics or lactobacilli, you can mainly rely on oral or topical application of bacteriological agents, but you need to be guided by a doctor after examination and diagnosis. It is not recommended to supplement probiotics or lactobacilli blindly by oneself to avoid disturbing the intestinal microenvironment, destroying the balance of flora and producing negative effects.