A few months baby is always scratching the lower body, consider with perianal eczema, diaper rash, vulvitis and other factors related. 1. Perianal eczema, some babies have perianal eczema due to the itchy skin around the anus, which may lead to the baby always scratching the lower body. 2. diaper rash, some babies appear diaper rash after due to the skin is more delicate, may lead to redness, swelling, itching and other symptoms appear, so it will make the baby discomfort, this symptom. 3. vulvovaginitis, baby vulvovaginitis due to inflammation of the vulvar area stimulation, may lead to inflammatory secretions oozing, stimulate the baby’s skin, so may appear this symptom. A few months the baby is always scratching the lower body, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.