At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
Do you know what is quantum fluctuations?
I read about it a while ago, its the fabric of the universe warping right?
look. the answer to your question is hidden in the definition of quantum fluctuation.
Not the answer you are looking for? Search for more explanations.
There really aren't that many "because's" in QM. If there is, it's usually 'because that is what the equation predicts' or 'because that is what is observed experimentally'. If you want an intuitive answer to everything QM is not for you.
Basically, you could say quantum fluctuation occurs because of the Heisenberg uncertainty principle. Velocity and position cannot be perfectly defined, so the energies associated with the particles is not perfectly defined either (or is subject to change for short amounts of time at least).