For example, in the fraction 3/4, the numerator, 3, tells us that the fraction represents 3 equal parts, and the denominator, 4, tells us that 4 parts make up a whole. The picture to the right illustrates 3 4 {\displaystyle {\tfrac {3}{4}}} or Â¾ of a cake.
The Causes of Sunburn Blisters. Sunburn blisters are a result of overexposure to the UVA and UVB rays in the sun. â¢ UVA. These harmful rays penetrate deep into the bottom skin layers and damage the production of new skin cells. High doses of UVA rays will cause sunburn blisters.
itchy. ' 1 Blisters are usually caused by injury to the skin from heat or from friction, which create a tear between the epidermisâthe upper layer of the skinâand the layers beneath. Short periods of intense rubbing can cause a blister, but any rubbing of the skin at all can cause a blister if it is continued for long enough.