I'm 29 and for the last 8 years I've had to limit how much makeup i wear because my skin keeps getting more and more sensitive, I have more acne problems now than I ever did as a teenager. The best thing I ever did for my skin was to stop covering it up and use gentle cleansers, especially things with tea tree if I am in the middle of a breakout. If you use brushes to apply your makeup wash them frequently and don't keep your pressed powders for too long, bacteria can be transferred to your makeup and you can be putting it right back on to your clean skin...