When matter is retained in the passages, and certain signs indicate this, and tension is felt, although there are no signs of fullness of the whole body, then there is undoubtedly a blockage. As for heaviness, it is felt when there is a blockage when it occurs in passages where a lot of matter must flow. This happens, for example, with a blockage in the liver: when the blockage prevents the passage of nutrients going to the liver, a lot of them are collected and retained, and this is very aggravating, more than the severity of the tumor; blockage and differs from a tumor precisely in its greater severity and absence of fever.
When the blockage occurs not in these, but in other passages, the heaviness is not felt, but a delay in the passage of blood and tamaddud is felt. Most people who have blockages in their blood vessels have a yellow complexion, since blood does not rush through the passages to the outer coverings of the body.