The black line in the baby’s stool after eating a banana is generally caused by the consumption of bananas itself, but also can not be ruled out is indigestion, etc., you can stop using bananas and observe the baby’s stools, the indigestion of the use of probiotics treatment. The black line in the stool after the baby ate the banana is generally caused by the consumption of bananas themselves, bananas themselves contain a brown crude fiber, more difficult to digest, due to the baby’s digestive function is not yet fully mature, may lead to the consumption of bananas after the crude fiber can not be completely digested, which led to the baby ate bananas pull black line. If it is caused by the consumption of bananas itself, you can stop using bananas and observe the baby’s stool after 2~3 days, if the baby continues to have black lines in the stool, then it may be due to indigestion, etc., and can be treated by taking probiotics, such as Bifidobacterium bifidum. If the baby ate a banana stool in the black line of the situation for a long time does not ease, need to take the baby to the doctor to improve the relevant examination after the targeted treatment and treatment. The above drugs should be used in accordance with medical advice.