Herpes simplex virus (HSV) in infants can be severe. Mothers with HSV can continue to breastfeed if no lesions are present on the breasts and if lesions.
If you have cold sores, it is safe to breastfeed your baby as long as the cold sores are not on the Mothersafe (Cold sores in pregnancy and breastfeeding).
Cold sores are caused by the herpes simplex virus, which is highly contagious. Because of this, breastfeeding mothers should use caution whenever they have a cold sore outbreak to prevent their babies from getting this condition. The herpes virus that causes cold sores is not.