Diarrhea is more common in children, especially those aged 6 months to 5 years. Diarrhea can be defined as 3 or more loose or watery stools in 24 hours. Increased stool frequency in exclusively breastfed infants is not diarrhea. Mothers who breastfeed their children can distinguish between diarrhea and diarrhea because the nature and frequency of the stools are different from normal. Most of the diarrhea that causes dehydration is a thin or watery stool. If the diarrhea is shorter than 14 days, the diarrhea is acute. Acute watery diarrhea can cause dehydration and malnutrition, and is the leading cause of death due to dehydrated diarrhea. Treatment of children with diarrhea focuses on prevention and treatment of dehydration and requires fluid and salt supplementation. All children with dehydration need fluid replacement, and the best way to rehydrate is to give oral rehydration salts (ORS); only severely dehydrated children need intravenous fluids. There are three principles for the treatment of diarrhea at home: 1) additional fluid replacement; 2) continued feeding; and 3) prompt follow-up in the event of bloody stools or poor water intake. If the child is exclusively breastfed, ORS should be given on top of increasing the frequency of breastfeeding and the duration of each feeding. if the child is mixed-fed, ORS, soup, thin gruel or boiled water can be given. The child can be given as much as he wants to drink. The steps to prepare ORS at home are: wash your hands with soap and water and pour everything in the ORS sachet into a clean container. You can use any container such as a tub, bowl or bottle. Measure 1 liter of cold boiled water (or the prescribed amount) and use a clean beer bottle, mineral water bottle or Coke bottle, pour the water into the container and stir it properly until all the ORS powder is dissolved. Taste the ORS liquid so that you know what it tastes like. ORS liquid must be prepared on the same day, with the lid closed after preparation, and any liquid not finished on the same day must be thrown away. After each loose stool, fluid needs to be replenished: 50 to 100 ml after each loose stool under 2 years old, and 100 to 200 ml after each loose stool for 2 years old and above. ORS fluid does not stop the diarrhea; its benefit is to replace the water and salt lost through diarrhea so that the child’s condition does not get worse. Give the child ORS in small amounts several times in a small cup or spoon. if the child is vomiting, wait 10 minutes before giving the child ORS fluid, but it should be given more slowly. Continue to give additional fluids until the diarrhea stops.