Arm rash

I discovered a pink rash on both arms on the inner part below my elbow today (not there yesterday). The right one is 10cm x 7 cm, and the left is 9.5cm x 6cm. They are not itchy or raised. The edges are rough, but they're slightly darker than the inside. The rash is not raised, but my arms may be slightly swollen. I have had peripheral edema in my ankles and lower legs for the past 2 1/2 months. Of the pictures online, the only rash that looks similar is erythema marginatum, but when I had a throat culture and rapid strep a couple months ago, they came out negative (but my throat is still inflamed and I have had no runny nose/cough/cold symptoms). The last known strep infection I had was scarlet fever 3 1/2 years ago (at 20 years old). I don't have a fever. I did have a similar rash on the underside of my upper arms earlier this year that only lasted a few days. Should I try to get a dr appt or is it nothing to worry about?

[Bhupinder Kaur, MD]

Hello,
Since the rash is non itchy and the size is also not too small, I will suggest you to get it evaluated from a dermatologist and get a biopsy skin done to confirm the diagnosis. It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.