Here are the best concealer tips usage and selection.
Most celebrity makeup artists agree that concealer should be reserved for those flaws (pimples, scars, under-eye circles, redness around the nostrils, broken blood vessels, dark inner corners of eyes, etc...) which cannot be covered with a few thin layers of foundation. It should be applied in the same way as foundation, with a thin layer first, totally blended, and then more thin layers as needed. It is always better to apply several thin layers, carefully blending the layers rather than one huge glob. Depending upon the color, you may apply it before or after foundation.
In general, dryer concealers adhere to skin better than creamy ones which can be more sheer. Stick concealers are the driest. They can resemble a pencil or a tube of lipstick. The "compact" variety can be either dry or creamy. The "pot" variety comes in a pot, tube or wand and is almost always creamy and therefore more sheer. For covering a pimple, you will probably want a dry stick one so the opaque color will adhere longer. To cover under-eye circles, most celebrity makeup artists want the consistency of a creamier one.
When choosing a color, stay away from white! It will only draw attention to the very things you are trying to hide. It will also make you look pale and wan. Yellow-based colors are the best for almost everyone, because they counteract both redness and blueness. A good yellow-based one is Your Bluffing by Benefit. If you would like to forgo foundation and wear only concealer you must shop around for one that matches your skin color as well as possible. This may be very hard, since they do not come in a wide spectrum of colors like foundations do. A good one for very pale skin is Everfresh Concealer by Maybeline New York, which can be found in most pharmacies and grocery stores. The color is so realistic and light that you don’t have to worry about wearing it outside.
Apply with sponges, brushes, or fingertips, in a thin layer and then add more thin layers if necessary. Always set it with powder. If you wear foundation apply it after and then set both with a powder. This will make it last longer. It is sometimes better to apply it with an eye-shadow brush, because a finger will generate too much body heat and may cause it to melt a bit. For the most flawless, undetectable application, blend the edges of it into the skin with an eye-shadow brush. If you wish to cover a pimple, it is better to apply one that is lighter than your foundation. This will lift the pimple up to skin tone. The foundation is then necessary to hide the concealer. When covering under-eye circles, do not apply too much, it can make eyes look smaller. Do not use shades lighter than your skin tone on under-eye circles or you will end up with what the industry refers to as “raccoon eyes”. Remember to not cover a blemish so much that you only call attention to it. Do not aim for a flawless finish, or you will apply too much. Instead, aim to de-emphasize the flaw. The places that make a huge difference in your appearance that most gals forget to cover are the dark areas on the sides of your eyes next to your nose. If you follow this best concealer tip and lighten this area up, you will instantly look more attractive.