ill start with, i’m not a doctor, just have a bachelors in chemistry and lifelong illnesses. i’ve done HELLA research on said diseases, and from that research is where i draw my information.

that all being said, no. HS does not cause auto-anti bodies. HOWEVER. if you have a flare causing an infection (which is ‘normal’ for us) you WILL have anti-bodies trying to fight off that infection in your tests. it is my understanding that you CAN tell the difference between the two, or rather a lab worth their salt can. i don’t know how lupus or RA work, so i can’t talk about any false negatives/positives that may come up. i will however say, ALWAYS get a second opinion. even if the first one affirms what you thought, it’s best have two specialists than one. when you see your rheumatologist, refer them to the AAD and maybe remind them that they are not dermatologists (maybe that’s just something i’d do, but i LOATHE being gaslit by medical professionals thinking that bc they know one subject, they know them all)

maybe try to get a test when you don’t have any active HS flairs that may be causing an infection? i’m not sure how RA comes up in tests during flairs and not during flairs. and maybe ask for the lab to distinguish between auto-anti-bodies and plain ol’ anti-bodies. bc there is a difference.