Brief Answer:
I suggest a likely possibility of discoid dermatitis

Detailed Answer:
Hello. Thank you for writing to us at healthcaremagic

I have gone through your query and I have also reviewed the Image.

I can see a disc shaped, dry, red patch of skin on your upper arm.

I suggest a possibility of dry discoid eczema.

Discoid eczema classically presents with dry, red, scaly patches of skin on outer aspect of arms and legs/ thighs and are more common in those who have dry skin, specially in dry and cold weather conditions in winters.
Itching is a prominent feature.
Scaling may be yellowish/ dirty and there may also be oozing and crusting secondary to scratching.

Psoriasis on the other hand presents as bright red plaques with silvery white scaling on extensor skin surfaces like knee, elbow, back, scalp etc.
Itching is variable.
Psoriasis is also more common in winters.

I would like to gather more information from your in order to be able to guide you better.

-Is it itchy?
-Do you have similar lesions elsewhere?If yes, where all?
-Do you have scaly lesions on scalp?

Regards

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Brief Answer:
I suggest a most likely possibility of dry discoid dermatitis

Detailed Answer:
Hi.

Thank you for additional information.

I suggest a likely possibility of dry discoid dermatitis.

I suggest you to use a moisturizer regularly all over the affected area/ arms.

Specifically for the patches I would suggest you to use a potent topical steroid e.g clobetasol propionate 0.05% cream Or Fluocinolone acetonide cream, twice daily, over and above the moisturizer.

An OTC Oral antihistamine e.g cetrizine 10 mg once daily will provide you symptomatic relief from itching.

Regards

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Brief Answer:
I suggest you to use a moisturizer+ topical steroid cream.

Detailed Answer:
Hi.

Discoid dermatitis is steroid responsive skin condition and I suggest you to use a topical potent corticosteroid cream, twice daily.

Eczema's, generally those associated with underlying dry skin like discoid dermatitis/ atopic dermatitis etc tend to flare in winters and go down in summers when there is plenty of sun.

The look of this lesion and distribution is not classic of psoriasis.
Psoriatic plaques are usually bright red, raised, have thick, silvery scaling and are predominantly distributed over joints like knee, elbow, lower back, scalp etc.

A skin biopsy would be confirmatory.

Also use a moisturizing cream over the affected area, twice daily

Regards

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