How do you treat excema?

Eczema therapy. Cerave, cetaphil and aveeno (oatmeal) carry wonderful over the counter eczema care products. Topical steroids are used as well.
Gentle skin care. Gentle skin care including all fragrance and dye free products, gentle skin cleansers, moisturizer after bathing, and steroid cream on any active rash.
Eczema. You must find the cause and if possible remove it. Eczema is not a specific disease, but inflammation from whatever cause confined to the epidermis, with cell swelling and death in patches. The most common variant is in the flexural creases of elbows and knees. Many rx's; topical steroids such as over-the-counter Hydrocortisone can be very helpful especially under saran-wrap.

Related Questions

How do you treat excema in children, particularly babies?

Varies some. The primary goal in treatment is maintaining the skin barrier to invasion by germs, not making it look "normal". A variety of moisturizers & creams are used along with steroid creams of different strength depending on the site & roughness. Topical or oral antibiotics are occasionally needed for skin infections that get through treatment efforts. Read more...
Try to find culprit. First try to determine if formula or other food may be the cause. Secondly you would want to keep the skin well hydrated and use moisturizers ad infinitude. In the end you may have to see a dermatologist or allergist for further treatment. Read more...