A eyelash lift is a cosmetic treatment that involves curling and lifting the natural eyelashes to give them a more lifted and defined appearance. This involves applying a lifting solution and a setting solution to the lashes, and then using a special tool to shape and hold the lashes in place. The process usually takes around 30-45 minutes and the results last for several weeks. Some people may experience slight redness or irritation after the treatment, but these side effects are typically mild and temporary.