1. Genetics is the main reason for one having oily skin. If parents have oily skin, the children are likely to develop oily skin as well. Oily skin is characterized by larger sebaceous glands that lie below the skin cells and secrete excess oil.
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2. Often the overuse of skin care products, such as harsh cleansing products, exfoliation and scrubbing may lead to excess oil being secreted by the sebaceous glands and leading to oily skin.
3. Seasonal variation also has a lot to do with skin types. If there is high level of heat and humidity, there will be a rise in the oil production in the skin in order to protect the skin from the heat and the sun. Again, when the air is dry in winter, the skin gets dehydrated and excess oil may occur when it overcompensates for what’s missing.
4. Oily skin could also be caused by birth control or other hormonal control pills. Any medication could causes dehydration and that would lead to an excess oil secretion in order to compensate for the dryness felt.
5. Stress also has a role to play. The androgen hormones lead to more oil production when the body is stressed and that could lead to excess oil on the skin.
6. Use of unnecessary skin care tools like scrubbing with a wash cloth, or using a rotating cleansing brush, hand mitts, buff puffs and strips can not only irritate skin, but can dry out skin, causing it to overproduce oil to compensate.
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7. Sun tanning is bad for reducing oil. In fact, although it temporarily dry out the skin, it actually triggers an injury response, which causes the sebaceous glands to surge production of oil in order to protect the skin’s surface.