Asking if you should apply concealer or foundation first is a bit like asking 'which came first, the chicken or the egg?' The simple answer: either! The not-so-simple answer: either! It all depends on what kind of coverage you need and the look you want. Many makeup-wearing people apply concealer around blemishes before a light application of powder. Some use it after to clear up uneven spots. Other's skip it altogether. applications fit a setting.