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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Black Discoloration On Knees And Ankles In A Diabetic?

I am about 340 & about 6 5 . I am a diabetic & on both of my legs from the knees to my ankles are black. I also do not have any feelings in them. I recently found out that I have a sore on one & a gash on the other but I didn t know they were there. What could this be?
Mon, 7 Jul 2014
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Geriatrics Specialist,  's  Response
Hi,
Looking at your diabetic history and the Present symptoms, it appears to be related to neuropathy.
The loss of sensation has occurred due to diabetes mellitus affecting the nerves.
Peripheral neuropathy is one of the common complaint in diabetes.
The lesions appear to be a dermopathy or acanthosis nigricans. Weight reduction with good control is the treatment advised.
For sores, good sugar control with topical antibiotics is necessary. It can further complicate to gangrene and might require amputation.
Foot care to prevent infections is very important.
Any further queries, happy to help again.

Dr. Prakash HM
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What Causes Black Discoloration On Knees And Ankles In A Diabetic?

Hi, Looking at your diabetic history and the Present symptoms, it appears to be related to neuropathy. The loss of sensation has occurred due to diabetes mellitus affecting the nerves. Peripheral neuropathy is one of the common complaint in diabetes. The lesions appear to be a dermopathy or acanthosis nigricans. Weight reduction with good control is the treatment advised. For sores, good sugar control with topical antibiotics is necessary. It can further complicate to gangrene and might require amputation. Foot care to prevent infections is very important. Any further queries, happy to help again. Dr. Prakash HM