This has only happened a couple of times to me, and it is currently happening right now… creepy but anyway sometimes when I am just sitting at my computer (like right now) I get a tingling on the right side of my back and it’s weird and I was just wondering if anyone knew what it might be!
more info, please. If it’s truly creeping you out, get some actual medical advice instead of asking people like us 
who merely THINK we’re smart.
Anyway, how long ya been there? It’s possible that you have poor posture and are squishing a nerve or two between vertabrae.
Go see a doctor.