Vascular health conditions in the lungs. These could cause granulomatosis with polyangiitis. This can be an unheard of illness through which the blood vessels are inflamed. Peripheral artery illness: Leg ache or cramps with action but strengthen with relaxation; adjustments in pores and skin coloration; sores or ulcers and tired legs. https://www.sgvascularctr.com/a-comprehensive-guide-to-aortic-aneurysm-in-singapore/