Peripheral aneurysms are a weakened area of a blood vessel that bulges.
Some happen in the aorta - my Dad had his there -but it can happen anywhere!
Claudication, a cramping of the muscles in your arms or legs while
exercising, or walking is just one of several symptoms of this...
to read more on this, see the following.
Hugs, Teri 
http://svs.vascularweb.org/_CONTRIBUTION_PAGES/Patient_Information/NorthPoint/Peripheral_Aneurysms.html
http://www.clevelandclinicmeded.com/diseasemanagement/cardiology/pad/pad.htm