Because your tonssils are to big and you need to have them out. But go to a dr because I had mine out and it hurt so bad I couldnt eat for 2 weeks so make sure you have to have them out befor you have them out. Just remember it will fell so much better when they are out
I would say the reason is because you have pulse in your neck as well as veins,arteries etc the best to you and if it is something bothersome to you please see your physician....