The causes of foamy stools and dilute yellow water in infants include the following: 1, caused by infants feeling wind and cold. After the infant feels wind and cold, the evil of wind and cold will attack the intestinal tract, causing the infant’s stools to increase in number and foamy. The infant will also have nasal congestion, runny nose, and even fever, which can be treated with patchouli oral liquid. 2. The infant has symptoms caused by enteritis. The infant suffers from rotavirus or norovirus caused by enteritis, will also cause frothy stools, can give the infant timely symptomatic support treatment, such as the application of probiotics and montelukast.