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Weird crust growing on big toe.

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I've had this crust growing on my big tow for a few years now and I don't know what it is. I've tried picking it off but it doesn't help because the skin is literally all crust and when I pick it off it reveals pink skin and the whole area gets worse.

Recently it has started to expand down the toe. Before it was just on the big toe join but now it extends down the big toe.
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replied December 18th, 2018
Thank you for asking at Ehealth forum!

I read your question and i understand your concern. You need to get examined by a dermatologist to rule out possibility of psoriasis or other skin exfoliating conditions.

I hope it helps. Stay in touch with your healthcare provider for further guidance as our answers are just for education and counselling purposes and cannot be an alternative to actual visit to a doctor.
Take care

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