Everybody likes sleeping. There is nothing better after a long day’s work than to crawl into a comfy bed and take a nap. But unfortunately, oversleeping effects are indeed nasty for those that do it for a long period of time:
Studies have shown that oversleeping each night can increase the risk for diabetes.
One of the bad oversleeping effects is obesity. By sleeping more you are being less active which eventually will lead to obesity, which by itself can cause a lot of other medical problems.
One of the most common and most unpleasant oversleeping effects is that most people who oversleep experience is headaches.