Erythematosus Rash

other than being shaped like butterflies, are there other mechanisms on the reasons for the appearance of butterfly or rash becomes visible on the patients? I hope you can help me. Thank you!

Only 30% of lupus patients have a rash butterfly.
Since lupus is a disease of the system, which means inside. Lupus can affect the kidneys, joints, blood, etc. that eczema is an autoimmune disease.
I know I'm off topic ....
The butterfly rash is worse with sunlight that most lupus patients are photosensitive, as having sensitive skin, it will act like a sunburn.
This is an anti-inflammatory in the body.