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Dr. Andrew Rynne
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What causes pustules on back?

My husband has had a bump on his back for months. But yesterday it started itching and had a large whit pus ball on the tip like a pimple. When i popped it brownish white stuff came out and the middle was open. I was thinking it was an ingrown hair but nothing was in the middle. what can it be
Tue, 18 Nov 2014
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Dermatologist 's  Response
Thanks for the query,
He might have developed sebaceous cyst.
It is a collection of dead material under the skin.
When you press this material comes out as black debris.
Dont worry its not a dangerous condition.
Treatment is mainly surgical.
It can be removed with the wall of the cyst, through a small incision.
Please meet a dermatologist for exact diagnosis.
Let me know if you have any other doubt
you can ask a direct question to me on this forum, following the below link.

Wishing you good health,
Thank you
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