Eyelashes like your hair run through hair cycles that cause the hair to fall out. Latisse is meant to make hair grow and not fall out so I would suggest going to the office that sold you the Latisse and talking with them about the concern of the bald spot.
Thank you for your question in regards to latisse. Our hair grows in different phases and will cycle out which is to be expected. Being consistent with the use of latisse will determine your results. Once you stop using latisse, your lashes will eventually return to there beginning state. To be sure what is best for you, see two or more board-certified providers in your area for a complete evaluation to make sure you are a good candidate and that it is safe for you to have treatment. I hope this helps.