The baby’s buttocks are green, some children’s buttocks are green, called “Mongolian spot”, this situation may be reduced and weakened with the growth of age; some of them may be moles, there is no need to be too nervous, because on the buttocks, it does not affect the child much, you can go to the dermatology department for follow-up; of course, there are some children’s buttocks are green because of trauma. As long as it is not a big hematoma, it can be observed first. Of course, if the baby’s bruised buttocks gradually expand or have other discomfort, you need to go to the hospital for examination as soon as possible. The above content is for reference only, please refer to the doctor’s instruction for specific medication and treatment.