hi, i've question there.
we know that cold make blood vessel to constrict (vasoconstriction) and heat do what we call vasodilatation. when we use for instance ice were aiming to reduce inflammation by restricting massive blood (bleeding) in injured tissue i.e; by doing vasoconstriction. But after 5-7 days we can use heat therapy like using of hot packs to bring nutritious blood to damaged tissue by means of vasodilatation. whats your comment?