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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Is The Cause Of Spot On Forearm That Is Itchy And Red?

I have what I thought may be a sun spot beginning on my forearm. However, it is perhaps 1/4 inch x 1/3 inch, slightly raised, hard to touch, broken skin on the surface and red underneath. There is no oozing or blistering. It has started to feel sensitive to sunlight and occasionally itchy. It has been there for several weeks now and has grown.
Mon, 3 Feb 2014
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Dermatologist,  's  Response
Hi. Thanks for posting your concern at HCM

I would keep a possibility of either a Light eruption (Polymorphic light eruption) Or Tinea.

Light eruption (Polymorphic light eruption) usually happen on the extensor aspects of the forearm because that part is usually exposed to sunlight and it happens during those times of the year when the sun is strong specially in spring because the skin which was mostly covered during winters is suddenly exposed to strong sun in spring. Later on in summers the skin gets hardened due to continous sun exposure and thus PMLE is less common later in the summers despite of strong sun.

Tinea can happen anywhere on the body and it classically presents as a red, scaly, annular patch.

I would advice that you see a dermatologist for a confirmatory diagnosis and proper management.

take care
regards
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What Is The Cause Of Spot On Forearm That Is Itchy And Red?

Hi. Thanks for posting your concern at HCM I would keep a possibility of either a Light eruption (Polymorphic light eruption) Or Tinea. Light eruption (Polymorphic light eruption) usually happen on the extensor aspects of the forearm because that part is usually exposed to sunlight and it happens during those times of the year when the sun is strong specially in spring because the skin which was mostly covered during winters is suddenly exposed to strong sun in spring. Later on in summers the skin gets hardened due to continous sun exposure and thus PMLE is less common later in the summers despite of strong sun. Tinea can happen anywhere on the body and it classically presents as a red, scaly, annular patch. I would advice that you see a dermatologist for a confirmatory diagnosis and proper management. take care regards