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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Dark Purple Rash On My Lower Back?

Hi doctor, I have a dark purple rash that has appeared on my lower back that I am slightly concerned about. I noticed it for the first time a few weeks back but after a 7-10 days it disappeared. I have suffered with lower back pain for 3 years but never seen this. I am a 33 year old male who is generally fit and healthy and as far as I can recall have had no trauma on my back in the last day or so.please if you could advise it would be a great help. Seems to be either side if my spine
Sat, 1 Sep 2018
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Dermatologist,  's  Response
Hi,

It could be a fungal infection or an eczematous dermatitis. Fungal infection presents with an expanding skin lesion with central clearing and a dry, scaly surface whereas an eczematous dermatitis is a scaly, thick patch of skin. I suggest you to kindly visit a dermatologist in your region for a confirmatory diagnosis. For a fungal infection I would suggest that you try an OTC topical antifungal e.g clotrimazole 1% cream, twice daily whereas for an eczematous dermatitis you would require a topical steroid cream. Both these conditions are usually itchy therefore I would also suggest adding an OTC oral antihistamine e,g cetrizine 10mg tablet for symptomatic relief from itching.

Hope I have answered your query. Let me know if I can assist you further.
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What Causes Dark Purple Rash On My Lower Back?

Hi, It could be a fungal infection or an eczematous dermatitis. Fungal infection presents with an expanding skin lesion with central clearing and a dry, scaly surface whereas an eczematous dermatitis is a scaly, thick patch of skin. I suggest you to kindly visit a dermatologist in your region for a confirmatory diagnosis. For a fungal infection I would suggest that you try an OTC topical antifungal e.g clotrimazole 1% cream, twice daily whereas for an eczematous dermatitis you would require a topical steroid cream. Both these conditions are usually itchy therefore I would also suggest adding an OTC oral antihistamine e,g cetrizine 10mg tablet for symptomatic relief from itching. Hope I have answered your query. Let me know if I can assist you further.