# Primary vs. Secondary Erythromelalgia and Aspirin **URL:** \ **Category:** General\ **Created:** [July 9, 2016, 3:10pm UTC](https://forum.livingwitherythromelalgia.org/t/primary-vs-secondary-erythromelalgia-and-aspirin/1783 "2016-07-09T15:10:52Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![Ocker](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.livingwitherythromelalgia.org/ocker/32/518_2.png) [@Ocker](https://forum.livingwitherythromelalgia.org/u/Ocker)\ **Post date:** [July 14, 2016, 12:08pm UTC](https://forum.livingwitherythromelalgia.org/t/primary-vs-secondary-erythromelalgia-and-aspirin/1783/6 "2016-07-14T12:08:49Z")
Hi Have a look at this thread, as it has a diagram I drew up a while back… > [@(Correct) Representative View of EM Sub-Types and Causes?](http://forum.livingwitherythromelalgia.org/t/correct-representative-view-of-em-sub-types-and-causes/648): > > I created a quick diagram to represent what I thought were the EM sub types and their causes. Interested in feedback, understanding that nothing will replace doctors advice but perhaps a quick overview may aid especially the newly diagnosed. I myself have used the 'Secondary' causes as somewhat of a checklist to see if these were underlying to my EM. The 'progression' part may be contentious? Are there people responsive to Aspirin who for many years have not shown an MPD/MPN? [310-EM.jpg](https://canada1.discourse-cdn.com/flex027/uploads/ben_erythromelalgia/original/2X/b/b3c49b024b6a12983db0cff7c8f73e623775a3fe.jpg) (134 … --- _[View the full topic](https://forum.livingwitherythromelalgia.org/t/primary-vs-secondary-erythromelalgia-and-aspirin/1783)._