i'm 15 and for the past few months i keep feeling a pulsing/tingling sensation all over my body - i don't know if it's pulsing or tingling or tremors or what. it has happened on my upper lip, my nose, my lower back, my upper back and just a few minutes ago i felt it on my toes. it happens even when that body part isn't in contact with anything? like i'm lying down with my leg in the air and i felt the pulsing. i also tend to get tremors when i write but that has been occuring for a couple years. should i visit a doctor?