WHY AM I HAVING So MANY LAG SPIKES ON MINECRAFT?!

Ive been having lag spikes on minecraft for a few days now and its getting extremly annoying. I have a very good computer its just that evrey few seconds my minecraft freezes for like 2 seconds and then i shoot right back up to 100 fps Please Help!

Read more: WHY AM I HAVING So MANY LAG SPIKES ON MINECRAFT?!