Yes, it’s generally safe to get lip fillers while breastfeeding. Lip fillers often involve injectables like Juvederm or Restylane, which are based on hyaluronic acid. 

The key point to remember is that these are localized injections, meaning they don't typically circulate throughout your body or end up in your breast milk. The American Society of Plastic Surgeons supports this view, indicating that localized treatments like fillers usually don't pose a risk to breastfeeding infants.

While there are no specific studies focusing solely on lip fillers and breastfeeding, the consensus in the medical community is that the localized nature of these treatments makes them compatible with breastfeeding.

Nonetheless, it's crucial to consult with your healthcare provider before undergoing any procedures.