The foreskin of a newborn baby is a little red is probably caused by the foreskin glans, foreskin eczema, allergies and so on. 1. glans phimosis: glans phimosis in newborns is commonly due to improper hygiene and cleaning, caused by dirt stimulation, which in turn triggers bacterial, fungal and viral infections. The main manifestations are redness, swelling, burning pain, accompanied by odor or purulent secretion at the glans penis. 2. Eczema of the foreskin: the foreskin causes eczema, resulting in redness and itching of the foreskin. Most of them are caused by damp and stuffy skin. 3. Skin allergy: due to allergens in diapers or clothing, causing allergy at the foreskin and redness. May also be accompanied by itching, rash and other allergic reactions. Newborns need to use to the diaper, easy to lead to the skin hot, humid caused by infection. Therefore, daily attention should be paid to keep the skin clean and dry, and timely clean pollution. If the above symptoms persist without relief, it is recommended to take your child to the hospital in time to clarify the cause of the disease.