Greasy hair can appear stringy and fail to keep its lightness and volume within a few hours of shampooing. Greasy hair can seem lifeless, dull oily and lank. It can also appear heavy and flat, refusing to stay clean and fresh. Is this describing your hair? Ever ask yourself "why is my hair greasy?" Others may judge people with greasy hair as having poor hygiene and that they do not wash their hair very often, even if the sufferer washes it every day.

The grease found in hair is called sebum and is oil that is produced natural by the body. Each of the hairs on your head has a gland called the sebaceous gland immediately under the skin, this gland produces sebum. Oil in greasy hair protects each strand form split ends and dryness, and is in fact a sign of healthy hair. Sebum is made as lubrication for the skin and hair, providing a protective barrier and preventing drying. Sebum is the body's own natural moisturizer.

Hormones called androgens can cause greasy hair by stimulating sebaceous glands, causing them to become over active and begin over producing sebum leading to an excess of sebum in the hair. Androgens are male hormones, and although they are present in both men and women, they are higher in men. Androgens make two things happen: First, they enlarge sebaceous glands. Second, they cause the increase of oil production from the sebaceous glands.

Fluctuating hormones can cause greasy as hormones play a part in sebum production. Greasy hair is most common in women because of either pregnancy or monthly cycle, older women going through the menopause, and teenagers experiencing puberty. Stress can be a contributory factor in greasy hair as it is known to affect hormones levels. People with fine hair on their head may experience excessive greasy hair as they have more hair follicles and more sebaceous glands producing more sebum.

There are a number of external factors in that cause greasy hair. Washing your hair too often can increase the production of sebum as the sebaceous glands produce more sebum to combat the stripping of oils from the scalp and hair which can happen as a result of frequent washing. Vigorous hair and scalp scrubbing can stimulate hair grease. Touching hair can also over-stimulate glands, as can brushing vigorously which carry oil through your hair. Pollutants in the everyday environment can cause hair to look greasy, along with product build-up at the roots from over-use of hair styling products.

There can also be a number of internal causes of greasy hair. I have already mentioned fluctuating hormone levels; however one of the leading causes when it comes to causes of greasy hair is your diet. Diets in the Western world are typically much greasier, higher in fat and sugar, processed and contain additives, the high fat content increasing levels of oil in the skin, potentially causing greasy hair. A diet that is low in vitamin B can also be a cause of greasy hair, along with the hormones often found in the meat of Western diets which can add to unbalanced hormones.

The best way of avoiding, preventing, treating and getting rid of greasy hair is to treat it from the outside and the inside. On the outside: steer clear of brushing your hair too frequently, and too vigorously. Avoid using a moisturizing shampoo as this can leave some oil in the hair. An extra cleansing or clarifying shampoo that has a mild-ph is the best shampoo to use for greasy hair. When shampooing, massage you hair and scalp lightly and do not scrub your hair and scalp.

For a more thorough cleanse, leave the shampoo in for about 5 minutes. You can always rinse your hair and shampoo a second time. How often you need to wash your hair is down to you. Ideally you should wash your hair 1-2 times per week. To find what is right for you, begin washing daily and then reduce the frequency to find your ideal balance of oil production and washing. If you plan to use a conditioner on your hair, apply the conditioner to the mid and ends of you hair only, and be sure to use a conditioner made for greasy hair. If you are using a hairdryer for hair styling don't let the dryer get too hot, heat can cause the production of more oil.

With the inside: do all that you can to reduce and eliminate any and all stress. In your diet, consider using a vitamin B supplement. Make sure you eat plenty of whole grains, seeds, nuts, leafy green vegetables, salads and fresh fish. Reduce the amount of fatty foods that you eat, avoiding greasy, fried and fatty foods as much as possible. Reduce the number of white flour based foods in your diet, foods like pastries, pasta and bread. Lastly, avoid sugar and sugary foods like biscuits, cakes and soft drinks.