_WHAT CAUSES ACNE?
Acne is caused a number of things, but dirt isn’t normally one of them. Acne blemishes form when dead skin
cells mix with your body’s natural (sebum) oil, forming a plug in the hair follicle. Dirt may play a role in clogging
the follicle but more often than not, the culprit of the plugged pore is "scale" or dead skin cells that slough off the
inner lining of your hair follicle.  Because dirt is not causing your acne, over washing your face or body (more than
2–3 times per day) will not make your it better.  In fact, too much washing or overuse of harsh scrubs and “pore
strips” can actually strip the skin of the oil it needs to stay soft and pliable. Over washing may stimulate your skin
to create more oil, thereby worsening the problem.

Rising hormone levels during puberty may cause acne. In addition, acne is often inherited.
Other causes of acne may include the following:

Hormone level changes during the menstrual cycle in women.
Certain drugs (such as corticosteroids, lithium, and barbiturates).
Oil and grease from the scalp, mineral or cooking oil, and certain cosmetics.
Bacteria growth inside pimples.
Acne can be aggravated by squeezing the pimples or by scrubbing the skin too hard. Some environmental
conditions such as pollution or humid conditions can also irritate the skin.
Acne is caused also by the overactivity of the sebaceous glands that secrete oily substances onto the skin.

The sebaceous glands of people with acne are especially sensitive to normal blood levels of a hormone called
testosterone, found naturally in both men and women.

Testosterone in people prone to acne triggers the sebaceous glands to produce an excess of sebum. At the
same time, the dead skin cells lining the openings of the hair follicles (the tubes that hold the hair) are not shed
properly and clog up the follicles.

These two effects combined cause a build-up of oil in the hair follicles. This causes blackheads and whiteheads to
form.

For some people, their acne does not progress beyond this stage.

However in other people, the build-up of oil in the hair follicles creates an ideal environment for a bacterium called
Propionibacterium acnes to grow.

These bacteria normally live harmlessly on your skin but when this ideal environment is created, they grow. They
feed off the sebum and produce substances that cause a response from your body's immune system. This
inflames the skin and creates the redness associated with spots.

In more severe 'inflammatory acne', cysts develop beneath the skin's surface. These acne cysts can rupture,
spreading the infection into nearby skin tissue. This can result in scarring.
Contrary to popular belief acne is not caused by eating fatty food or chocolate.
dirt - blackheads get their dark colour through excess skin pigment - not dirt so washing more does not help,
although if you do not wash your skin at all, bacteria will be able to multiply
Acne is not contagious, so you cannot catch it.
There are a number of things that can make your acne worse. These include the following:

picking and squeezing the spots may cause further inflammation and scarring stress can make acne worse in
some people, although it is not clear why in women, outbreaks may be affected by the hormonal changes that
occur during the menstrual cycle excessive production of male hormones such as testosterone from conditions
such as polycystic ovary syndrome may be another cause.
Some contraceptive pills may make acne worse. This is due to the type of progestogen hormone in some pills
whereas some other types of contraceptive pills can improve acne - see Treatments section below. Your GP will
advise you which contraceptive pill to take
some medicines can make acne worse. For example, some medicines taken for epilepsy, and steroid creams
and ointments that are used for eczema. Do not stop a prescribed medicine if you suspect it is making your acne
worse, but tell your GP. An alternative may be an option
steroids can cause acne as a side-effect
         
 
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