Hello dear. Thank you for using Healthcaremagic. I read your query and I understand your concern. You can treat your psoriasis in elbow by topical treatment. Try to use. : 1Topical corticosteroids. These drugs are the most frequently prescribed medications for treating mild to moderate psoriasis. They reduce inflammation and relieve itching and may be used with other treatments. 2.Vitamin D analogues. These synthetic forms of vitamin D slow skin cell growth. Calcipotriene (Dovonex) is a prescription cream or solution containing a vitamin D analogue that treats mild to moderate psoriasis along with other treatments. 3.Anthralin. This medication helps slow skin cell growth. Anthralin (Dritho-Scalp) can also remove scales and make skin smoother.  4.Topical retinoids. These are vitamin A derivatives that may decrease inflammation. 5.Calcineurin inhibitors. Calcineurin inhibitors — tacrolimus (Prograf) and pimecrolimus (Elidel) — reduce inflammation and plaque buildup. Calcineurin inhibitors are not recommended for long-term or continuous use because of a potential increased risk of skin cancer and lymphoma.  6.Salicylic acid. Available over-the-counter (nonprescription) and by prescription, salicylic acid promotes sloughing of dead skin cells and reduces scaling.  7.Moisturizers. Moisturizing creams alone won t heal psoriasis, but they can reduce itching, scaling and dryness. Moisturizers in an ointment base are usually more effective than are lighter creams and lotions. Apply immediately after a bath or shower to lock in moisture. Best regards.