Brazil nuts are especially high in selenium, containing 544 micrograms, and other tree nuts such as almonds and cashews have high amounts of both selenium and magnesium. Whole grains such as wheat and oats are also high in both minerals, with up to 160 milligrams magnesium and 60 micrograms selenium per serving.
Medical Definition of wheal. : a suddenly formed elevation of the skin surface: asa: welt; especially : a flat burning or itching eminence on the skinb: the transient lump occurring at the site of injection of a solution before the solution is normally dispersed.
They may cover all or part of the body and are usually very itchy. 1  Hives usually break out first on the covered areas of the skin such as the trunk and upper parts of the arms and legs.  Wheals appear in batches. Each wheal may last from a few minutes to six hours.