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.
Dermographism is a condition in which people will experience a wheal reaction after the skin is rubbed or touched in a way that produces a response. In some people, the reaction can burn, sting, and even itch.For others, it may not hurt at all, and only provides a cosmetic embarrassment.ermographism pictures and images like the one below show how the skin forms a wheal on its surface after being stroked or rubbed with a rigid object. Notice how the letters and numbers are very distinct, which is where the term âskin writing diseaseâ getâs its name.