1. YOU ARE USING THE WRONG SHADE
When buying foundation make sure to test three shades that are closest to your skin.The one that disappears into your skin is your perfect match.The best place test your foundation is at the edge of your jaw line.Avoid testing foundation on your wrist because the skin color of your face may be different from that of your wrist.
2.WRONG TYPE OF FOUNDATION
Is your skin dry,combination,oily?Know you skin type that way you will be able to know whether to use liquid, cream or cream to powder foundation.Each skin type has a specific foundation that is best suited for it.My skin is oily so i mostly use cream to powder foundation.
3.WRONG APPLICATION METHOD
First of all try not to apply too much product on you face all at once.Apply it in bits and eventually you will get your preferred results .If a brush does not work for you try to use a sponge.I usually use my foundation brush to spread the product on my face then i go in with a dump beauty blender to even out and blend.
Always blend/apply your product up to your jawline to avoid visible makeup lines,and a mask appearance on your face and blend blend blend.
one trick i personally use is to wait a few minutes between product applications.Otherwise you just be packing one product after the other without letting it settle into the skin.This contributes to cakey makeup.I hope this information will help.