The most probable risk factor associated with the leaning of forearms on the sharp edge of a counter is getting an injury on the forearms by creating pressure on the skin.
A risk factor is the increased possibility of having an injury or infection. It can be due to the happening of any event or the presence of any harmful object which leads to that injury or infection.
When an individual bends his/her forearm over the sharp edge of the counter, then it leads to the pressing of the skin present on the forearms against the sharp edge. There is a layer, called epidermis present on the skin which gets injured very badly due to the sharp edge and creates marks or strokes on the forearm.
Therefore, the pressure on the skin is the risk factor present when leaning the forearms on the sharp edge.
Learn more about the risk factor in the mentioned link:
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