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What Do Protruding Black Patches On Skin Indicate?

Posted on Wed, 29 Oct 2014

Question: Hi doctor .I have chronic itching of skin .. It first appeared like big rash in legs which was itchy and look like protruded black patches which after taking antihistamines and cremes settled down to black ovules . after biopsy it was seen to be prurigo nodularus . now I get itching on forearms and thighs at intervals on daily basis . my stomach seems upset most of times .. I now take light and non oily food. The itching also is between anus and scrotum which gets intense at night . does it have a liver disease or anything serious ? I used to drink a lot and chain smoker .. Now I stopped drinking and smoke 2 ciggs a day .. Please suggest Sir.

Answered by Dr. Dr. Rahul Kumar (1 hour later)

Brief Answer:
immunosuppresants

Detailed Answer:
Hello XXXXXXX
Thanks for the qury and photographs.
Prurigo nodularis is an autoimmune disorder.
Itching with formation of nodules is the main feature of this disease.
You need treatment with inmunosuppresants like azathioprine and strong antihistamine like thalidomide. Please discuss with your treating doctor regarding these.
Don't worry liver is not involved in this disease.
Let me know if you have any other doubts.
Thank you

Above answer was peer-reviewed by : Dr. Yogesh D

Follow up: Dr. Dr. Rahul Kumar (11 minutes later)

Thanks Doctor for your reply .. In my forearms there is also itching and that occurs at intervals . some become black like or white like powder on the skin . is that the same disease ? is the disease curable ? autoimmune sounds scary to me .if I eat egg or chicken sometimes I get rashes.. but if I don't even take them .. still itching occurs. Need to tell you that the first itching if my life occurred due to egg allergy which went away temporarily by taking avil.. pls advise ..

Answered by Dr. Dr. Rahul Kumar (12 hours later)

Brief Answer:
not related to egg allergy

Detailed Answer:
Hello
Thanks for the follow up.
Don't get scared by autoimmune word.
This condition remains confined to skin.
It will not affect your organs.
It is not related to egg allergy.
Treatment with immunosuppresants and antiallergic medication will help you.
Let me know if you have any other doubts.
Thank you

Note: Hope the answers resolves your concerns, however for further guidance of skin related queries consult our Dermatologist.Click here to book a consultation

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar