This may be a flare of the lupus.
Moreover, this edema may be caused by nephrosis (abnormality of the kidney characterized by protein in urine >3.5 grams/day,
hypertension and swelling):
I would check routine urine analysis, the 24 urine sample for protein, serum for
albumin levels, and check for high blood pressure.
Secondary, examine the joints for
arthritis (warmth, swelling,
pain).
Generalized edema is not an adverse effect of Plaquinil.
Your physician will discuss treatment options.
Keep us posted.