Oily skin is shiny, thick and dull colored. Often a persistently oily skin has coarse pores and pimples and other embarrassing blemishes. It is prone to blackheads. In this type of skin, the oil producing sebaceous glands are overactive and produce more oil than is needed. The oil oozes and gives the skin a greasy shine. The pores are enlarged and the skin has a coarse look.

The reason too much oil is being released has to do with the lipids and fatty acid deposits underneath the skin not getting broken down and re-circulated into the bloodstream. Instead they are being released as sebum (oil). What enables our body to break down these fatty acids is directly associated to an enzyme called coenzyme A, which is an essential enzyme to the body and is used for fatty acid metabolism.

Causes of oily skin:

1) Heredity
2) Diet
3) Hormone levels
4) Pregnancy
5) Birth control pills
6) Cosmetics you use
7) Humidity and hot weather

Because of the hormonal shifts of adolescence, oily skin is common in teenagers, but it can occur at any age. In general, skin tends to become dryer with age. The flow of sebum or oil increases during adolescence and starts decreasing with age. During pregnancy and menopause, hormonal imbalances can also upset the oil balance and increase the activity of sebaceous glands. Many people have skin that is oily only in certain areas and dry or normal in others, a condition known as combination skin.

Skin Care for Oily Skin:

1) The great advantage of oily skin is that it ages at a slower rate than other skin types. 
2) Oily skin needs unique cleansing with plenty of hot water and soap to prevent the pores from being clogged. Avoid harsh products that strip your skin of oil and encourage flakiness. They can cause a reaction known as reactive seborrhea, where the oil glands work overtime to compensate for the loss of natural oils.
3) Avoid skincare products that leave your skin feeling tight and dehydrated. They cause the upper layers of the skin to shrink. This restricts oil flow through the pores leading to blockages and breakouts.
4) To cleanse oily skin, use oil-based products as they dissolve sebum effectively. Opt for oil-free moisturizers to maintain a shine-free complexion.
5) Keep your skin very clean. Limit washing your face to two or three times a day. Too much washing will encourage your skin to produce more oil.
6) Choose your cleanser with care. Avoid heavy cleansing creams. Avoid the use of harsh soaps or cleansers. Use a pure soap with no artificial additives. Try an antibacterial cleansing lotion or a lightly medicated soap, and use it in combination with a water rich in minerals, not tap water. Do not use cleansers or lotions that contain alcohol. After cleansing, apply a natural oil-free moisturizer to keep the skin supple.
7) Use hot water when washing your face. Hot water dissolves skin oil better than lukewarm or cold water.
8) If your skin is extremely oily, three or four daily cleansings may be in order and little or no moisturizing necessary before you are 30 years old. After that point, the skin around your eyes and mouth and on your throat may benefit from a nightly moisturizing, plus a mere touch of moisturizer in the morning.

Types of Homemade Facials:

1) Lemon and Strawberry Juice: The juice of these citric fruits contains a natural astringent, which helps to close the pores in oily skin.
Ingredients: 1tsp Lemon juice, 2egg white, 2tsp honey, 1cup strawberry, 4drops eucalyptus oil (optional).
Properly mix the above ingredients and apply all over the face and neck. Leave it on for 10 minutes. Then rinse. Do this at least twice a week. You will see wonders.
2) Apple Mask: You need 1midium sized apple grated and 5tsp of honey. Mix the grated apple with honey. Form a smooth paste. Apply it on the face and keep for 10-15minutes.Rinse off with cold water.
3) Strawberry Mask: 8-9 strawberries and 3tsp honey. Do not smash the strawberries completely leave granules mix it with the honey and apply all over the face. Rinse after 10minutes.
4) Bay Clay Facial Mask: Clay is excellent to remove oils and toxins from your skin. It tightens the pores and revitalizes the skin.
Ingredients: 4tsp French Day, 5dried bay leaves, 1cup distilled water.
Method: Put the bay leaves in a cup of boiled water and let it cool. Strain and keep the liquid. Add the bay liquid to the day until it is thick. Put onto the skin and let it dry wash with warm water.
5) Tomato Mask: Take the puree of 4-5 ripe tomatoes. Mix it with some potato flour. Make a fin
      paste and apply all over the face. Wash after 15 minutes. This will help the skin to have an oil    
      free skin.
 
Any fruit, which is acidic in nature, will brighten your skin and refresh it. It is always best to have a trial on a small part of the skin. Mostly homemade masks are very safe. These masks help to close the pores .In oily skin the pores are opened due to which a lot of oil is secreted and pimples are formed and also you land up having an oily look on your face. These masks help to refresh your skin and avoid the formation of oil.