How to deal with diarrhea in a 2-month-old baby?

Patient's question:

Onset time of diarrhea: September 20th
Laboratory test results: Detailed examination of childhood diarrhea
Previous treatment and effectiveness: Took a few days of medication, got better, but after two days, it started again.

Doctor's answer:

If the stool contains foam, it often indicates that the child has digestive problems. Only when the child's digestion is poor and there are more food residues, do the bacteria in the intestines ferment and produce gas, which can again lead to the stool containing foam.
Additionally, the presence of foam in the stool may also be related to the child crying for a long time and swallowing excessive air. If the child also experiences vomiting, with the vomited milk having an acid odor, or undigested milk clumps, or abdominal pain (when the child lies flat on the bed, with the abdomen lower than the chest), and the stool contains foam without mucus or pus, with the frequency of bowel movements increasing but the consistency remaining yellow or slightly greenish, or loose and mushy, then it is likely digestive problems.