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Skin Conditions

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Acne

Acne is one of the most common conditions we treat in dermatology. It’s also one of the most misunderstood. Did you know that face washing and hygiene play very little role in acne formation? Instead, it’s the result of our hormones interacting with our oil glands and pores.

The most common time that this interaction occurs is when we’re younger (adolescence to teen years), when our hormones are elevated for obvious reasons. Another time this can occur is when females experience flares as a result of hormonal fluctuations throughout the month.

Complicating matters further, genetics affects this hormonal interaction as well. If we inherit oil glands which are particularly sensitive, they can undergo changes even when we have ‘normal’ hormone levels!

So what exactly are the changes which result from this interaction between our hormones and oil glands?

The first hormonally-driven change occurs when the skin cells within our pores ‘stick’ to each other and clog the pore. This is seen in what many will refer to as a ‘blackhead’. So-called open comedones(‘blackheads’) are nothing more than a combination of skin cells and oil which, when exposed to the air, have turned dark. This is important – the dark surface of ‘blackheads’ is not caused by dirt! This is a misconception.

There are other types of comedones called closed comedones. Closed comedones are also the result of skin cells clumping together, but they are formed deeper within the pore. As a result, their surface isn’t exposed to the air, so they don’t form the characteristic dark color seen in ‘blackheads’.

So what causes inflamed acne pimples?

The inflammation seen within the average acne pimple is caused by a bacteria called P. acnes. It’s a bacteria which is actually present in everyone’s skin and is unique in that it prefers a ‘low-oxygen’ environment. When the previously-mentioned comedones are formed deep within the pore, they can limit the ability of oxygen to reach the oil glands – the very place where this bacteria lives. With little oxygen present, the bacteria thrives, essentially causing an infection of the oil glands that we recognize as the typical red acne pimple.

Treatment of Acne

Now that you know how acne is formed, it should be no wonder that most treatments focus on either unclogging the pores, killing bacteria, and/or decreasing the ability of hormones to influence the oil glands in the first place.

Unclogging the Pores

The two types of medications which help to unclog the pores are retinoids and keratolytics. Retinoids are medicines like over-the-counter ‘retinol’, and prescriptions like tretinoin, Retin-A®, and Differin®. They work by changing the rate that skin cells lining your pores are produced which, in turn, helps prevent them from clumping together. Alternatively, salicylic and glycolic acid are the two most common keratolytics. They work by breaking up the clump of skin cells and oil that create the previously mentioned ‘comedones’.

Killing Bacteria

Both topical and systemic antibiotics can be used to kill the P. acnes bacteria. Benzoyl peroxide is the most well-known of the acne-fighting antibiotics and is applied topically. It’s found in a number of over-the-counter products, though it’s also incorporated into many prescription medications. Most patients visiting a dermatologist have found that benzoyl peroxide alone provides only limited relief. At this point, it’s time to consider prescription antibiotics – in either topical (lotions, creams, etc.) or systemic form (pills, capsules, etc.).

‘Blocking’ Hormones

Decreasing the ability of hormones to create acne-causing changes in the first place can be an effective treatment. For a variety of reasons, though, this treatment approach is one which is only available to female patients. Examples include oral contraceptives as well as a medication called spironolactone.

Ultimately, the treatment of acne is about achieving the desired results while causing you the least number of side effects and inconvenience. Your dermatologist will discuss which treatment options are best-suited for your particular situation.



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