The upper arm and shoulder region is subject to accidental injury the same as any other body part. Since our arms are used so much, such damage can affect our quality of life frequently and directly. There are relatively few diseases that are unique to this area, but injuries to the brachial plexus nerve network or vascular disorders can show up here, which need prompt medical attention.
The network of nerves that run from the head down to the fingertips runs through this region. These fragile nerves can be damaged from a variety of accidental and other causes, but repair is often possible.
Accidental damage to these frequently used limbs can be extensive, but modern medical treatment can provide highly functional replacements if they're lost. Tearing, cutting, and crushing injuries may all result in permanent arm loss.
The large number of veins and arteries in this area are subject to injury from both accidents and disease. Any restriction of the blood flow through this region can cause serious, permanent damage to nerves, muscles and other tissues that extend all the way down to the fingertips.