I keep getting small pimples on my right forearm. I shower daily, I m retired, age 56, male, and live in the Chicago area. These pimple keep showing up on my forearm every couple of days and in a linear arrangement from elbow area to just short of my wrist. They are either on the outside or inside of the forearm, but never both sides at once. Since it is winter/spring and there are no bugs, I don t believe it is bites.