“…4 This may manifest as hypothenar hammer syndrome, whereby patients experience pain and digital ischaemia when striking the ulnar palm. 5 Smoking and its effects on the arterial wall and vasospasm of the digital arteries may predispose individuals to development of ulnar artery aneurysm. Treatment of ulnar artery aneurysms is not well established due to the rarity of the condition, though surgery may be considered, particularly where there is nerve compression or risk of digital ischaemia.…”