A few tips from someone who has dry undereye skin, fine lines, and deeper lines (which is where creasing tends to happen):
“Creaseless” concealer does not exist. I’ve tried various concealers by NARS, Huda, Lancôme, MUFE, Glossier, Tarte, MAC, Shashbox, Too Faced, BareMinerals, Bobbi Brown, Sephora, Urban Decay, Charlotte Tilbury, Jouer, and others I’m forgetting right now. They all fall into lines. ALL of them. Even the ones that claim not to.
So, don’t rely on a concealer’s “no creasing” claims. Instead, rely on your undereye skincare.
Moisturize the heck out of your undereyes. Depending on how dry your skin is, that could mean applying one layer of moisturizer, giving it 2-5 minutes to absorb, then applying a second layer of that same moisturizer, and maybe a third or fourth layer if needed. The goals are to seal in hydration and plump your skin up a bit (understanding that the only way to “erase” lines/wrinkles and sunken skin is injectable fillers). The more hydrated and moisturized your undereyes, the less dry they’ll look under any concealer.
My current AM undereye routine is whichever serum I use on my entire face that morning (usually The Ordinary Buffet, but now I’m testing Youth to the People’s vitamin C “Superfoods” serum), then Biossance Squalane + Peptide Eye Gel as an eye moisturizer, then sunscreen. There are plenty of other good eye creams/gels/oils out there, like Kora Organics Noni Radiant Eye Oil which I still occasionally use at night. Whichever one you use, make sure it’s great at sealing in hydration.
Try applying moisturizer to damp skin. If your undereyes are quite dry by the time you reach your moisturizer step, tap some water on them. Your moisturizer should seal that hydration into your skin.
When applying concealer, avoid your lines if possible. (Assuming you have lines under your eyes.) This is tricky depending on where your lines are and why you’re using concealer in the first place. I use concealer to mask darkness. Some mornings, my darkness is primarily in my sunken tear troughs, so that’s exactly where I apply concealer—and I apply only the tiny amount needed for that task. I don’t carry it up toward my deeper set wrinkles. That way, there’s no chance of creasing. Other mornings, I’ve got dark circles completely under my eyes (due to lack of sleep or allergy-driven eye rubbing) and have to decide if I wanna bother covering them or not.
If your creasing’s caused by concealer sliding around—which is less likely if your skin’s dry—you can try an undereye primer (Smashbox makes one), or even just an eyeshadow primer, to help hold concealer in place. I personally don’t like doing that, but it works for some folks.
Use less concealer and setting powder. The more concealer you apply, the greater the chance of caking and creasing. And you shouldn’t need much powder to set concealer. I mean, if you like doing the instagram/youtube concealer technique of “brightening” with lots of concealer, that’s cool, I won’t tell you not to. Makeup is a personal choice, after all. I’ll just say a lighter hand with concealer and powder can make a difference.
You can also try tapping a little face oil over setting powder. This doesn’t work well for me, but it’s a trick others have used successfully.
I hope some of this helped!