White bumps on the elbow can be caused by a variety of skin conditions, including contact dermatitis, eczema, psoriasis and dry skin, according to Healthgrades. Allergic reactions to food and medication also cause white bumps to appear.
Contact dermatitis occurs when the skin is touched by a product or chemical that is an irritant. Fabric detergents and softeners, perfumes, and air particles, including dust, pollen and pet dander, are common examples, states Healthgrades. Eczema and psoriasis are skin conditions that cause bumps, itchiness, and patches of white, flaky skin. Dry skin occurs naturally and can be treated with lotions. Allergic reactions need to be identified before they can be treated, but white bumps and itchiness are symptoms.