So I m having these small bumps on my arm and they drive me crazy. They are very tiny and they appear out of the blue! It then disappears with in the next 15-20 minutes. They show in my arms, elbows, hands, knees and thighs! How do i get rid of them?! I don t use any medication but I do have I a dog which I had for 3-4 years. But even when the pet isn t present with me they still appear even when I go out!