Low Grade Fever. Chills, Some Head Congestion (such As A

Low grade fever. chills, some head congestion (such as a Cold) Body aches, I also have a red spot on my right buttock. I thought it was possibly a hair bump that I found what I was showering a few days ago, I tried to "pop" it while I was showering but do not know if anything can out or not. It is larger than a 50 cent piece and has a hard spot in it. It is warm and tender to the touch