Weird problem??

Hi, so this isnt rlly anything ti do with periods or pregnancy or anything like that, but im 15 and ive noticed that the veins in my hands and feet do this weird like vibrating/pulsing thing every once and a while and I was wondering if anyone knew anything about stuff like that?? its like very repetitive super quick (like one little pop lasts about .1-.2seconds). Just wondering if any yall doctors or nurses know anything about this type of stuff. Thanks.