When we are stressed, our bodies react. For most people, it isn't a very visible or noticeable reaction, but when we have Lupus, reactions seem to be multiplied. Your rash probably is related to your Lupus.
As to whether it's "officially" a Malar rash - I couldn't say. I think that's mostly a matter of opinion, and even dermatologists and rheumatologists may disagree. I don't think the rash has to be permanent to be considered a Lupus rash.
Other than adding to the list of symptoms being used in initially diagnosing Lupus, I'm not sure how much it matters. I don't know of any treatments specifically for the rash.
My rash tends to always be visible on my arms, and only sometimes on my face.
Hope that helps!
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2000DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde