What reaction is produced by moderate mechanical pressure to the skin?

Moderate mechanical pressure applied to the skin typically leads to vasodilation, which is the process where blood vessels expand. This occurs because the stimulation of the skin triggers nerve endings that signal the body to increase blood flow to the area, promoting delivery of oxygen and nutrients, and aiding in the removal of waste products. Vasodilation enhances circulation and can also contribute to a feeling of warmth and relaxation in the treated area.

While hyperemia (increased blood flow) can occur in response to mechanical pressure, it is more of a broader term that can result from vasodilation. Vasoconstriction, on the other hand, is a narrowing of blood vessels that would reduce blood flow and is not typically a response to moderate pressure. Inflammation involves a more complex immune response and is not a direct response to moderate mechanical pressure but rather a reaction to injury or infection. Thus, the proper reaction you can expect from moderate mechanical pressure is indeed vasodilation.