Odd oval dryish skin bumps on my sister

I don't know what they are. Last week, some red oval raised bumps appeared on my sister, aged 16. There was one on  her shoulder, and some on the side of her chest. They looked a bit dry, and were definitely NOT ringworm. They looked a bit dry with some dead skin. We thought they were just some reaction to something and decided to wait a week to see if they went away before seeing a dermatologist.  As a side note, she has had no sexual history or any known allergies. She has nasty acne, which was passed to her from her mother's side of the family. Our father has had a long history of possible cancerous mole removals. Besides that, there is no other medical history really.

One week later, she has a new raised bump thingy on her arm and one on her leg as well.
Now, most of them are closer to flesh tone and not as red as before. The new ones are redder than the old ones. They look drier than before.
We cannot get to a dermatologist for until next week, and I am attempting to figure out what it is to ease my sister's paranoia that she has eczema or rosacea, but honestly, it doesn't look like either of those.

What is this?

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[Bhupinder Kaur, MD]

Hello,
If the spots have suddenly appeared then it may be due to an allergic reaction but other possibilities like viral rashes, pityriasis rosea etc also need to be ruled out. These may also present with spots on abdomen. In pityriasis rosea, initially, a primary plaque, called a herald patch, is seen. Then it is followed by a distinctive, generalized rash 1-2 weeks later. The rash lasts approximately 2-6 weeks and is found in a Christmas tree pattern over the trunk and abdomen.

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.