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Hidradenitis supurativa, also known as acne inversa, is a chronic skin condition involving the inflammation of the apocrine sweat glands, forming pimple-like bumps known as abscesses. These tend to recur in specific regions of the body, can be very painful and often leave behind deep scar tissue when they heal.
The cause of hidradenitis supurativa is not known, although there are several factors that are thought to be involved in the pathophysiology of the condition. These include:
There are also some other health conditions that are linked to hidradenitis supurativa and individuals that suffer from these are more likely to be affected by the skin disease. Crohn’s disease, in particular, is associated with a higher risk and is thought to stimulate the progression of hidradenitis supurativa.
The hallmark sign of hidradenitis supurativa is the formation of abscesses that can be very painful and ooze pus when ruptured. They typically appear in specific areas of the body, such as the groin, armpits or underneath the breasts.
Initially, a single lesion in one region will appear, which may resolve within 15-30 spontaneously or rupture and leak pus. It is common for scar tissue to form when the lesion clears. More abscesses will likely recur in the same region and sinus tracts may form as the disease progresses, which are narrow channels of pus underneath the skin.
In some cases, bacteria can colonise the lesions and lead to an infection of the area, increasing the production of pus and symptoms of pain.
Hidradenitis supurativa can be classified according to the stage of progression of the disease, as follows:
These stages help to understand the severity of the condition and guide the treatment decisions to manage the symptoms.
There are many different treatments that may be used in the management of hidradenitis supurativa with varied success. Most patients find they need to trial several options before finding the most effective solution to prevent their symptoms.
Initial treatment usually begins with simple lifestyle changes to help reduce the number of lesions and the severity of symptoms. This may include losing weight, stopping smoking, eating well, avoiding irritants and wearing loose-fitting clothing.
These is a wide range of pharmaceutical options available, such as:
Additionally, some patients may require surgery to treat severe cases of hidradenitis supurativa. Depending on the individual circumstances, the procedure may involve laser surgery, cytotherapy, deroofing, drainage, incision or excision.
The ideal treatment is highly variable and most patients will need to trial several different options before finding the best solution to help control outbreaks and increase their quality of life.