lash lift damage your lashes provided you follow pre | 11 Things You Need to Know Before Getting a Lash Lift

The lash lift will not damage your lashes, provided you follow pre- and post-treatment care as instructed.
The treatment is not painful, however it may feel strange, and you'll have to keep your eyes shut for the duration of the treatment (approximately 45 minutes).
The Eyelash Emporium's lead technician, Joanne McGovern, suggests getting lashes retinted three weeks after the treatment to maintain that faux mascara look.
Avoiding heat treatments or sunbathing for 24 hours will ensure the tint does not fade.