Thromboangiitis obliterans (Buerger's disease)

DDx

Limb ischemia due to emboli or atherosclerosis
Autoimmune: Raynaud’s disease, polyarteritis nodosa, systemic lupus erythematosus, antiphospholipid antibody syndrome, Takayasu’s arteritis
Rare: ergotamine intoxication, cannabis arteritis, hypothenar hammer (jackhammer) syndrome

There's more to see -- the rest of this topic is available only to subscribers.