Breastfeeding gray nail how not to infect the baby that measures include reasonable treatment, pay attention to personal hygiene. 1. Reasonable treatment: the preferred treatment for gray fingernails is oral antifungal drugs, but breastfeeding is not recommended for routine use. When breastfeeding women have gray nails, they can apply appropriate topical antifungal drugs for treatment, such as clotrimazole ointment, terbinafine hydrochloride cream, which may have a preventive effect on the further aggravation of gray nails. 2. Pay attention to personal hygiene: breastfeeding women should also pay attention to personal hygiene, keep the affected area clean, personal clothing should be washed separately, do not wash with the baby’s clothes, and do not share some toiletries with the baby. In the process of treating gray fingernails, you should follow the doctor’s instructions and use reasonable medication for treatment.