Symptoms Of Raynaud's Disease

Red Flush And Swelling

Red flush and swelling are caused by the rapid return of blood to the affected areas. As the arteries expand again, the blood stuck behind the closure rushes through to equalize the pressure gradient created by the constriction. This will cause the skin in the area to flush red for some time once blood flow can return to the affected areas. The sudden inflow of blood also causes the swelling. The arteries expand to a size slightly more than usual, making a noticeable increase in the size of the affected region. The throbbing and pain may also be felt here. Again, the swelling should decrease shortly after the blood flow returns to normal levels.