Itchy, burning rash on elbows & knees. Diff & infreq urinating. Pain n bk woke up swollen arms-fing, knees- toes&face. Have lupus&fibro any ideas?

Lupus flare. The symptoms you are describing sound pretty severe. The rash on the elbows and knees is consistent with psoriasiform lupus and I am concerned about your back pain which could be related to pancreatitis. Since you know you have an autoimmune disorder, i would make an appointment with your rheumatologist asap.