What should be done if a baby has diarrhea for a long time and has four or five episodes of it every day?

Patient's question:

Patient Gender: Expert, hello
My child is already three and a half months old. Since he was given a little pork rib soup when he turned 100 days old, he has been having diarrhea for the past week and a half, with four or five episodes daily. I took his stool to the hospital for testing, and the results showed no problems. The doctor also said there were no issues, but this condition has not improved. What could be the reason, and how should it be treated?

Doctor's answer:

Hello: Based on the situation you described, there is nothing wrong with the child, and there is no need to worry. What you need to do is actively provide good dietary care for the child.
1) Gradually adapt the infant to new foods. At the beginning, you should first make the child accustomed to the flavors of soups, juices, etc., to pique their interest. You can dilute adult soup by 2-3 times and cool it to a temperature similar to body temperature before feeding it to the child before breastfeeding. Juice can be mixed with water and fed directly, or mixed with formula milk to drink.
(2) Gradually increase the amount and variety of complementary foods for the infant. When introducing a new complementary food, do so gradually, starting with a small amount and gradually increasing it. Hasty introduction can easily lead to failure. At 4 months of age, start by introducing a small amount of scrambled egg yolk. Begin with 1/4, and after a week, if the child's appetite and digestion are normal, increase it to 1/2. Gradually increase it to a whole yolk. At 6 months, the child can start eating whole eggs. Do not introduce two or more new foods at the same time. First introduce a complementary food that the child has never eaten before. Once the child has adapted to it, introduce another new food.
(3) From thin to thick, from soft to hard. Infants aged 1-3 months can drink rice soup, vegetable soup, juice, etc. As the child grows older, gradually introduce thin porridge, soft noodles, biscuits, etc. If the child does not like a new complementary food the first time, it may lead to a dislike for it in the future. Therefore, the first time you introduce a new complementary food, make it softer and more palatable to make it easier for the child to accept and avoid vomiting caused by hard food.
(4) From fine to coarse, from powder to pieces. The complementary foods introduced must be made as fine as possible. Fresh vegetables should be