Breast milk is said to help soothe the dryness of your baby's skin. If there are specific areas, you can soak a cotton ball in breast milk and apply it to the affected area. Parents also bathe their baby in breast milk if they have a severe skin condition such as rashes, eczema, an itch of bug bites, etc. It's not a medical treatment, but some parents see a difference in their baby's skin condition as breast milk soothes them. If you're wondering about this sort of treatment, then talk with your pediatrician to clear any doubts. Otherwise, follow their form of treatment.