The Underlying Causes of Acne

What could be the underlying causes of acne on our faces, bodies and etc?
Excess oil on the skin can be a cause of so much acne, according to Nemours. Over-production of oil by the Sebaceous glands can block the pores, which can lead to pimple formation. With this being the major factor, there could be other causes, find out from the video. Enjoy and learn!