Red spots on the baby’s buttocks may be diaper rash, there may be eczema and other causes. 1. diaper rash: baby butt red spots may be diaper rash, mainly due to the baby’s skin is more delicate, often caused by diaper friction, the main symptoms will appear locally red and swollen as well as pimples and other phenomena, there will also be ulcers and erythema. 2. Eczema: If the weather is hot, and to the baby to wear clothes too thick, coupled with the baby’s buttocks covered with a thick diaper, not breathable, it is more likely to appear eczema, which led to the baby’s buttocks have red dots. Red spots on the baby’s buttocks may also be caused by other reasons, such as mosquito bites, etc., it is recommended to take the baby to the relevant departments of the regular hospital to identify the causes, and then targeted treatment. Normally, we should be diligent to change the baby’s diaper, but also to keep the local clean and dry.