Hello and thanks for trusting me to help you. I am a board certified consultant with over 30 years of experience.Please provide more information regarding your question so I can help you in detail.
Is it red,raised rash on affected area?
Is it located on one patch of skin?
Since how long have you been suffering from?
Any other medical history?
Are you taking any medications?
Have you tried any new medication/product?
Numbness,tingling sensation on affected area?
If possible can you please upload a picture of affected area?
Waiting for your response.
Thanks for all these additional information.I understand your concern.
Well as you describe,possible causes may include Neurodermatitis, Brachioradial pruritis.
Neurodermatitis is a condition where the nerves in any area of the body become hypersensitive and fire under normal conditions to produce a sensation of itching. The skin may look absolutely normal.
If you have tried drugs/creams/lotions/ointments to no avail, your itching symptoms are likely due to brachioradial pruritus. This condition usually involves arms.
Most patients with this problem say that only ice gives temporary relief.This is a condition that affects nerves and/or nerve roots. Sometimes it may appear to be seasonal or diurnal (occur mostly around the same time of the day), and no one knows why.
It is a poorly understood disorder but it is a form of neuropathy.
One of the treatments that is successful was a medication called lamotrigine. Gabapentin works too.
You can try some self care measures like
OTC Jergens Naturals Ultra Hydrating Daily Moisturizer applied under wet wrapping of bandage.
Also OTC 1% Cortizone cream apply after moisturizer twice a day.
OTC Claritin 10-20 mg twice a day.
OTC Capsaicin cream applied 3-4 times a day over the affected area.
And see a dermatologist for further evaluation and management.
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Jergens Naturals Ultra Hydrating Daily Moisturizer,1% Cortizone cream,Claritin 10-20 mg,Capsaicin cream are available over the counter at your local pharmacy most likely.
If your symptoms'll not improve in a week then see a dermatologist for further evaluation and management.