rash on my face in the evening

more than a month ago i had some dry skin on the corner of my mouth.  it never went away, and the past few days, its turned into a rash that runs up my face to my cheeks.  the rash is on both sides of my face and its small red bumps with dryness.  i've never had eczema before, but it does look like it.  it doesn't itch though.  this rash also only happens in the evening.  so far, it goes away by the morning.  what it is / how can i get rid of it?  food allergy? anyone else had this?

[Dr Rajput]

Hi, welcome to the forum, your symptoms are suggestive of malar rash which is seen in an autoimmune disorder, Systemic lupus erythematosus (SLE). It is a chronic inflammatory disease of unknown cause that can affect the skin, joints, kidneys, lungs, nervous system, serous membranes, and/or other organs of the body.

The other possibilities of the rash are allergic dermatitis, Drug eruption or photosensitivty, Rheumatic fever, Porphyria cutanea tarda etc.

A skin biopsy that includes immunofluorescence testing on both involved and uninvolved non-sun-exposed skin (the "lupus band test") may help to differentiate SLE-associated cutaneous involvement from other disorders.

As for allergic dermatitis is concerned, oral antihistamines and topical corticosteroids can be taken against prescription. I suggest you to consult physician. Take care and regards.