Symptoms of necrosis include bone pain when applying pressure or weight, bone and joint collapse, and pain that prevents using the affected joint, according to WebMD. In its early stages, no symptoms may be present at all, but they typically increase as the condition progresses.
Necrosis, also known as avascular necrosis, osteonecrosis, aseptic necrosis or ischemic bone necrosis, occurs due to the interruption of the supply of blood going to the bones, explains WebMD. Without an adequate blood supply, bones may become weak and die. If it progresses far enough, it can result in collapsed bones. Although it most often occurs in the upper leg, it is not uncommon for necrosis to appear in the arms, knees or shoulders.