Can sweat cause lash extensions to fall out?

Yes. Excessive sweat can cause lash extensions to loosen and fall out more quickly. Sweat contains salt and natural oils that can weaken the adhesive bond, especially during the first 24 to 48 hours after application when the glue is still curing. Frequent exposure to high humidity, workouts, or saunas can also shorten the lifespan of the extensions. To minimize the effect, gently cleanse the lashes after sweating and avoid touching or rubbing the area. Maintaining proper aftercare and using a protective sealant can help preserve lash retention even for those with active lifestyles or regular exercise routines.