壊疽の原因は幅広い。患部で嫌気性細菌（あるいは好気性菌）が急速に増殖する事により起こる。大元の原因は動脈硬化症、糖尿病、腎不全（透析患者）、膠原病、血管炎、感染症などさまざまである。 For those who have a ailment that raises your hazard of receiving gangrene, such as diabetic issues, it is vital you've frequent check-ups to evaluate the state of the toes. Report any troubles to the GP ... https://www.sgvascularctr.com/what-is-a-gangrene/