What causes fever and red bumps?

I am a young adult and I have symptoms that point to the infant viral infection roseola http://www.kidshealth.org/parent/infecti...
I had a high fever, fatigue, and small red bumps (not blistery, that are warm) on in the inside of my arms, back of my legs and some on my neck and stomach.
I did not eat anything new or take any new medications, so it probably was not an allergic reaction.
Before symptoms, took a walk for a few miles in 85 degree weather with shade (I can run few miles in hot weather, never had heat stroke.)
Hydrated okay.
When I am feverish, the bumps are more red and hot.
One of my hands (back and front), the palm area is swollen, hot, and red. Unlike the rash.
A few days earlier, I strained my neck by messenger back and bruised area around jugular.
No coughing, sore throat, runny nose.
Not sexually active.

All suggestions of possible cause appreciated. Thanks.

You did your research! Kudos for a challenging question.

I can't tell you anything you already don't know, I just wanted to thank you for being intelligent.

I wish you the best of luck

chicken pox

You should talk to your doctor it might be a rash!

If they are in a line (along a nerve) it could be shingles.

i would doublecheck that you were not bitten by a tick. overall, it sounds like a virus of some kind...most likely a doctor wouldn't identify it, just ask you to come back if the symptoms don't go away in a few days. recently a friend of mine experienced similar symptoms and was told it was 'an allergic reaction to a virus'-- go figure!

get well soon.

that could be a lot of things. however i have heard that fever associated with rash can be serious