Three and a half months, the baby refuses to eat milk

Patient's question:

Besides two days, the baby will be four months old. In the past three weeks, the baby hasn't been very willing to eat milk, usually about 40 ML each time. During the day, my milk supply is sometimes low, but she only eats one breast and refuses the other. I've tried giving her formula, but she won't drink it either. At night, when my milk is more abundant, she eats normally. Later, she started to accept formula, but when using the bottle, she always plays with it for a long time before drinking. Sometimes she can drink up to 150 ML, but other times she refuses to drink. Overall, her feeding pattern is very irregular. Her daily milk intake will never be less than 500 ML, and each feeding session lasts for one or two hours. When she cries, if I hold her, she stops crying and then I quickly put the bottle to her mouth. After a while, she stops drinking again. But in recent days, she has started to refuse breastfeeding. When I hold her in the breastfeeding position, she arches her back and cries. If I force the nipple into her mouth, she bites it, and none of the breast milk gets into her mouth. She also drinks very little formula. I'm so frustrated. Clearly, her spirits aren't as good as before, and she doesn't laugh as much as she used to. It breaks my heart to see her! When she's hungry, she would rather suck her hand or her lips than breastfeed or drink from the bottle. (Digestion: When the bottle is fed, bubbles form inside, quite a lot, like when detergent is sprinkled. She has a bowel movement once a day, which is dark brown and sometimes has many bubbles, or sometimes contains small yellow particles.) Please tell me what's wrong with my baby? What should I do? A heartbroken mother urgently awaits your explanation!!! The kind of assistance I need: Please tell me what's wrong with my baby? What should I do? A heartbroken mother urgently awaits your explanation!!!

Doctor's answer:

Your baby is now almost four months old, and the best feeding food is still breast milk. It is recommended that you eat more foods that promote milk production to ensure an adequate milk supply for your baby. If the milk supply is still insufficient after lactation, you can appropriately supplement with formula milk, but it is best to base it on breast milk, using formula as a supplement. When mixing formula milk, be careful not to shake it too much to avoid creating too many air bubbles, which may interfere with your baby's sucking.

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