well it's a little painful, depending on how sensitive your skin is, and where they do it. The cheek area wouldn't be as bad as the upper lip as far as pain. Take a couple ibuprofin before you go, and ask the electrologist if they can use a numbing creme on your skin. It's not pleasurable like getting a massage, but it's not too bad.....you can tolerate it.
Besides it's worth it! You'll feel great when the hair is gone!