The reason the malar rash
of lupus spares the naso-labial fold is not known. This rash
which spreads to the folds may not be due to lupus. Itchy
can be due to allergic dermatitis, eczema, scabies, contact dermatitis (soap, powder, cosmetics), shingles, psoriasis, fungal infection like or Tinea.
Non itchy rash
can be petechiae, which are pinpoint-sized red do
ts under the surface of the skin.