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What Causes An Itchy Red Spot On The Thigh?

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Posted on Wed, 28 Dec 2016
Question: woke up this am and notice a very large red area on my outer thigh area that appears to be from scratching the area in my sleep. Some areas are solid red in color and others you can see the lines where I've extracted my leg. I've seen this before but never this large. I no longer take and blood thinners (it's been over a year now) from previous blood clots.
doctor
Answered by Dr. Klarida Papaqako (2 hours later)
Brief Answer:
Please upload a photo and provide some information

Detailed Answer:
Hello,

Thank you for using HCM to post your health query.
I read carefully your question and I understand your concern.

Can you please upload a photo of that red rash?
Is it itchy? Burning sensation?
Any other part in your body except that?
Have you ever had like this before? Why you say that you have seen it before?

Looking forward to your follow up question.

Regards,
Dr. Papaqako

Above answer was peer-reviewed by : Dr. Prasad
doctor
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Follow up: Dr. Klarida Papaqako (48 minutes later)
How do I upload of photo located on my MacPro laptop

It's not itching right now, no burning sensation. I've noticed in the past if I over scratch an area on my legs, arms but they are very small areas. I can't figure out how to upload the picture from my laptop.
doctor
Answered by Dr. Klarida Papaqako (56 minutes later)
Brief Answer:
Possible dermographism

Detailed Answer:
Hello,

Thank you for the follow-up question.

There should be an upload option on the right side of this page. You may use it to upload photo. Alternatively you can mail it to YYYY@YYYY with subject as "Attn Dr. Papaqako".

What you are describing seems like dermographism, which is the hyper reaction of the skin due to scratching. In general, just applying a mild steroid cream would be helpful, like Hydrocortisone 1% or Triamcinolone.

But I want to rule out herpes zoster as well, that's why I wanted to have a look at it to be sure.

Regards,
Dr. Papaqako

Above answer was peer-reviewed by : Dr. Prasad
doctor
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Follow up: Dr. Klarida Papaqako (2 hours later)
Hi, I have provided some attachments. Please review them.
doctor
Answered by Dr. Klarida Papaqako (16 hours later)
Brief Answer:
Looks like dermatographism from the scratching

Detailed Answer:
Hello,

Thank you for the follow-up question and the photo uploaded.

I saw it carefully and it looks indeed like dermatographism, called differently physical urticaria.

Simple dermographism that is not itchy requires no therapy, and treatment involves avoidance of inciting triggers.
If the skin appears dry, emollients (such as hydrated petrolatum applied daily immediately after bathing), can be helpful.

If you are itchy you can take an antihistamine like Cetirizine or Loratadine in a day.

Hope this is helpful.
Let me know if you need more clarifications.
Otherwise please kindly close and rate the answer.

Regards,
Dr.Papaqako
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. Yogesh D
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Answered by
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Dr. Klarida Papaqako

General & Family Physician

Practicing since :2010

Answered : 1804 Questions

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What Causes An Itchy Red Spot On The Thigh?

Brief Answer: Please upload a photo and provide some information Detailed Answer: Hello, Thank you for using HCM to post your health query. I read carefully your question and I understand your concern. Can you please upload a photo of that red rash? Is it itchy? Burning sensation? Any other part in your body except that? Have you ever had like this before? Why you say that you have seen it before? Looking forward to your follow up question. Regards, Dr. Papaqako