Shiny Tan Bump

I was sitting out in the sun today, and i noticed a shiny, raised bump on my arm. It is slightly darker than the rest of my skin. It doesn't look like a pimple, and it is probably half a centimeter in diameter. There is also another similarly colored spot higher up on my arm, but it isn't raised. Any ideas?

[Bhupinder Kaur, MD]

Hello,
I cannot confirm anything without examination but it can be eruptive syringoma, polymorphous light eruption or lichen myadenomatosis. I suggest you to get it examined from a dermatologist. Eruptive syringoma presents as hyperkeratotic papule on the chest or arm. Biopsy skin can help in cofnriming 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.