Over exfoliation can damage your skin, so also does under exfoliation.
Over exfoliation will cause dryness to the skin, irritations and in worse cases, injuries. Ideally, experts warn to exfoliate at least thrice weekly for persons with oily skin and lesser for persons with dry skin types.
Also, avoid using dirty towels or scrub brushes to exfoliate as these could increase your facial troubles.
An unhealthy diet or eating lifestyle
The absence of a healthy diet will render efforts at achieving great facial skin futile.
Include vegetables and fruits such as watermelon, strawberries, citrus, carrots, kiwi etc. in your diet. Foods rich in Omega 3, vitamins and minerals are great boosters for healthy skin.
Do not also underestimate the power of drinking clean sparkling water. The greatest boost for glowing and wrinkle-free skin is drinking enough water.
Finally, lancing of acne or blackheads with hands and other objects tend to cause more damage than provide remedies. Instead, opt for natural methods to getting rid of blemishes such as cinnamon powder and raw organic honey.