The causes of infant buttock redness include diaper dermatitis, eczema, candida intertrigo, etc. The treatment drugs include hormones, ketoconazole ointment and so on. 1. Diaper dermatitis: If it is diaper dermatitis, you can give a clean diaper change and apply anti-inflammatory treatment such as mometasone furoate. 2. Eczema: If the redness of the buttocks is caused by eczema, anti-inflammatory treatment such as mometasone furoate should be given. 3. Candida intertrigo: fungal infection, keep the local dry, can use ketoconazole ointment and other antifungal drugs for treatment. Finally, the phenomenon of red baby buttocks, please go to the hospital in time to check, the above drugs need to follow the doctor’s advice.