Hypothenar hammer syndrome (HHS) is a vascular occlusion in humans in the region of the ulna.
[3] A physical examination of the hand may show discoloration (blanching, mottling, and/ or cyanosis; gangrene may be present in advanced cases), unusual tenderness/ a callous over the hypothenar eminence, and fingertip ulcerations and splinter hemorrhages over ulnar digits; if an aneurysm is present, there may also be a pulsatile mass.
An angiogram may show a "corkscrew" ulnar artery or an occlusion or aneurysm at the hook of the hamate.
[citation needed] Noninvasive treatments have an 80% success rate; Example: switch jobs, stop smoking, regular finger exercise, surgical options exist for other instances.
[1] HHS, though rare, occurs much more frequently in men than in women (9:1) and principally affects those in their 40s and 50s.