Hi Kiara,
The redness of the malar rash is caused by increased blood flow throught the vessels under the skin because of inflamation. So, yes, if you apply pressure to it, the blood willl blanche out and it will go transiently white until the blood refils the vessels.
This is in no way diagnostic or characteristic though. Pretty much all rednesss is this type. The only rashes that do not blanche are where the blood leaks out of the vessels - ie petechia, purpura and echymosis.
For the most non experts, it is pretty much impossible to tell whether a rash is the "lupus" malar rash or rosacia or sunburn just by looking at it. One trick is that the lupus rash does not affect the labial folds - the area next to the nose above the lip (which creases when we smile). Rosacia usually does affect this area, and also will develop pustules eventually which ACL does not. Still, if you want to be sure about it, you need to see a dermatologist. This is worth doing, as they may well be able to offer treatment to lessen the effect of the rash too.
X C X
The redness of the malar rash is caused by increased blood flow throught the vessels under the skin because of inflamation. So, yes, if you apply pressure to it, the blood willl blanche out and it will go transiently white until the blood refils the vessels.
This is in no way diagnostic or characteristic though. Pretty much all rednesss is this type. The only rashes that do not blanche are where the blood leaks out of the vessels - ie petechia, purpura and echymosis.
For the most non experts, it is pretty much impossible to tell whether a rash is the "lupus" malar rash or rosacia or sunburn just by looking at it. One trick is that the lupus rash does not affect the labial folds - the area next to the nose above the lip (which creases when we smile). Rosacia usually does affect this area, and also will develop pustules eventually which ACL does not. Still, if you want to be sure about it, you need to see a dermatologist. This is worth doing, as they may well be able to offer treatment to lessen the effect of the rash too.
X C X