@lilcuti Welcome to Mayo Connect. We are not doctors, but fellow patients, family members, and caregivers who share our experiences and strength with others.
Your symptoms sound uncomfortable to say the least! While i also live with autoimmune disorders, this one I am not familiar with, so I looked it up. NCBI, the National Center for Biotechnology Information, published an article this past June that may give you some information: https://www.ncbi.nlm.nih.gov/books/NBK470369/
Also, there is an article from John Hopkins Medicine https://www.hopkinsmedicine.org/health/conditions-and-diseases/erythema-nodosum
While both point to a possible spectrum of causes, it can take time to figure out what the underlying reason is. Have you experienced any of the possible causes these articles refer to?
If you live near one of the Mayo Clinic campuses, or a large teaching hospital, you may have more success getting to the root of it all and finding relief.
I would like to hear more about what might have brought this condition on!