For concealer to avoid creasing under the eye, the trick is to use less (Especially closer to eye sockets or lower lash line).
I have also noticed, when I use too much setting powder even then my concealer creases. “Beauty blender power pocket puff” kind of sponges really do a great job in setting under eye!
What brand mascara and concealer are you using?
Invest in a good skin tint and a really good make up setting spray.
Nude by nature is the worst! Plus it smells really bad after a while (worse than Dollarama beauty). Their eye shadows don’t have any pigment and lipsticks smell horrible
From drugstore- maybelline Sephora- huda beauty
Huda and shape tape are very high coverage concealers, not sure how much coverage you are looking for- maybe try using very less of it and make sure to keep your under eye hydrated well with eye cream (it could also be because your under eyes are getting drier)
Waterproof mascara is the only solution - I get watery eyes too and using lash primer plus WP mascara is the only way to go for me
Hope this helps :)