The body is made up of different parts. When one part is not working it affects other parts. Another part of one’s body that is affected by a service connected disability is called a secondary claim. Overuse of the left arm affects the right arm; a knee injury can affect the back and cause sciatica down the legs. High blood pressure can affect the heart or cause a stroke. In order for a veteran to be where he wants to be, all secondary issues need to be addressed.