By opening the injury area to the outside, the risk of complicating infections increases. The break occurs at an angle across the bone and is usually the result of a sharp angled blow to the bone. A small portion of bone, with ligament or tendon attached, is pulled away from the main bone segment. Force has been applied to a strong tendon, causing it to pull on and break off a portion of bone. Compression Fracture occurs when the mass of bone is compressed, usually by forces in opposite directions.
Compression fractures are most common in the spinal vertebrae.
Fatigue A complete or incomplete hairline fracture that develops after repeated stress to the bone. Impacted The broken ends have been driven into each other. Pathologic fracture A break that occurs from a minor injury in bone weakened or destroyed by disease. Fluid then fills this 'space'. So really, blisters are nothing more than a fluid filled sac.