Ascending erythematous lines across my back

[asmallchild]

I've had this issue since I was a child. I have these marks that start out almost looking like bruises on my lower back. Then change into erythematous linear marks running across my back (the spinal region bilaterally). I'm on here now because these lesions seem to be slowly ascending and I'm concerned.

I don't think it's shingles because they are painless and are bilateral (not running across a dermatome)

I was told possibly tinea versicolor but this is reddish and not pale.

I don't have any systemic symptoms. It doesn't itch. It doesn't hurt. My doctor prescribed me a cream that I'm assuming is a steroid because after a couple courses of treatment, my erythematous lines turn into a whitish line (steroid hypopigmentation?)

Was curious what I have and if I need further biopsy from a dermatologist given the slow ascending nature of the condition?

Thanks a bundle.

[Bhupinder Kaur, MD]

Hello,
One possibility for your symptoms is tinea versicolor. The second  possibility is of neuralgia parasthetica. It also presents as itchy, dark pigmented patch seen one the back or trunk. Sensation to light touch, temperature, vibration, and two-point discrimination may be normal or abnormal.

Biopsy skin can help in confirming 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.

[asmallchild]

Anyone?????