Itipiso Chanting

I try to do abit of chanting everyday, and I have tingling feelings in my upper body (spine/arms) the moment I begin chanting starting with Namo Tassa, Itipiso, homage to Dhamma, homage to Sangha, when I chant other suttas like bojjhana sutta I get the tingling feeling too. However when I do reading of the suttas, I do not get the tingling feeling. I'd like to ask if it happens to everyone who does chanting, and what is the cause for this tingling feeling.