Undermoisturizing is another common mistake. Many people are afraid to use oils as moisturizer for fear that it will clog their pores and lead to more oil production. This couldn’t be more wrong.The use of stripping cleansers and oil-free lotions, can actually lead to an overproduction of oil in the skin and throw it off balance. Undermoisturizing can also lead to more fine lines and damage down the road.
Using Dirty Makeup Brushes
It does more damage to the skin than you think. Invest in a brush cleaner, especially for your foundation brush. Keeping your brushes clean every day will erase the transfer of dirt and old makeup to your skin. Always clean them as you don’t want to end up putting bacteria on your face.
Excerpt from askderm