Hi sorry to hear that you are having issues with ulcers. They certainly are no fun at all.
I get them all the time in my mouth, on the roof of the mouth, my inside cheeks, tongue, and along my gum lines. My Doctor usually provides me a prescription for valtrex and it usually helps clear stuff up. I also use soda water rinses. This summer I had a fever blister on my lip, the first in like 5 years. It was so bad that my lip now has a permanent scar on it now.
I'd suggest you give your Doctor a call and see if they will give you a rinse or something to help with it. My tongue is currently raw (like it's been thru a meat grinder) but it's not from my lupus, but from the amount of Methotrexate I'm taking at the moment. I was given a saliva replacement medication to help with that from the oncologist.
As for the correlation between ulcer ans disease activity it depends on the person. I do know that there are times when I have ulcer and I don't feel as if I'm in a terrible flare up We all vary from body to body. I hope you can get rid of your ulcer quickly and that you start to feel better really soon. Welcome to the forum, sorry you need it but you'll really find everyone very helpful.
Take care and let us know how this week goes and if the ulcer gets better.
DX- RA, Lupus, Fibro, LGL Leukemia, Obstructive & Central Sleep Apnea, Pulmonary Hypertension, Bells Palsy, Gastroparsis, Blood Clots, Glaucoma, Chronic Pericarditis & Pleurisy, Severe Anemia. Way to many medications to list.