I sometimes have a feeling of twitching or pulsing in throat or neck. it tenses up and twitches. faster than my actual pulse? am young. is this normal

Muscle Twitching: this is likely a muscle in your neck twitching. This is a fairly common occurrence. Unless it is associated with numbness or is a prolonged event it is not worrisome.

Need more info: This is a common question. The answer is that there are very many causes for your complaint, from anxiety, drugs, a real cardiac problem to a whole lot more. You didn't mention your age and that is a critical part of your history. You must make an appt with your family physician and have him/her examine you to really answer your question and ease your mind.