If a baby passes blood during bowel movements without pain or visible piles, the most common cause is a small tear in the anal area called an Anal Fissure, often due to hard stools or constipation. However, in some infants, it can also be due to milk protein allergy or infection, so it should not be ignored. The first step is to keep stools soft by ensuring adequate feeding (breast milk is best), gentle hydration if advised, and avoiding straining; keeping the anal area clean, applying a doctor-recommended soothing ointment, and giving warm water baths can help with healing. Do not use any medicines without medical advice, and it is important to consult a pediatrician to confirm the cause, especially if bleeding repeats, increases, or is mixed with mucus, so that proper treatment can be started safely.