Lash fills are a part of routine lash maintenance.

Lash extension fills are simply new lashes placed on natural lashes as the old ones are about to fall off. 

Ideally, you should come in every two to four weeks, but longer wait times may mean a longer treatment time as more lashes will need to be filled. 

In general, it’s best to perform a refill service when the client has at least 40% of the lash extensions left from the full set.