What do you know abou Pilonidal sinus?
Question:
Answers:
There are certain "hollow tubes" in your body that apparently do nothing. They are according to experts a freak of evolution.
The term for a "hollow tube" in medicine is a sinus, some of them, like the ones near your nose have a function.
Many of the ones at the base of your back and in the groin area seem to serve no purpose.
Hair roots that are constantly compressed by clothing and sitting down get irritated and may start to swell. If the hair snaps at the root, the already inflamed root gets irritated by the sharp stubby hair.
The body's healing process produces something akin to scar tissue very rapidly to cope with this irritation.
This may trap the hair under the skin.
Further irritation results and the area gets infected. The build up of pus further traps the hair, which in turn produces more pus.
All of this eventually breaks out into one of the sinus cavities. The trapped hair may break off at the root again and roam free in the cavity several times. Each time it does this it produces more irritation, resulting in even more rapid infection and swelling.
Treatment is surgical. The cavity is opened and all the debris removed. If it is a sinus with no purpose (most of them are), the wound is left open so that the sinus fills up with scar tissue, preventing recurrence, because by this stage the whole area will probably have permanent damage to all the hair, sweat/pore machinery making recurrence much more likely if the sinus was simply resealed.
The open wound must be treated very carefully, otherwise it will get infected needing antibiotics.
Apart from the back/groin area, this may happen in the face as well, particularly on a man owing to shaving too close.
Other Answers:
It is a common area for infections. If they don't get better on their own you may need a surgical procedure to drain them and correct the defect.
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