"Unfortunately messages has stopped" Now my phone won't stay on. Why??

[AC Question]

I got a pop up on my screen saying" unfortunately messages has stopped " then all the sudden my phone tried to restart on its own but wouldn't pull up the home screen so I had to take the battery out aND put it back in and the screen finally came on, so I tried making a phone call and I get another pop up saying that the phone has now stopped!! NOW my phone just keeps shutting off and trying to restart but as soon as it shows the home screen it powers off again. What do I do

 

[ctepu1]

It could be the storage, although, what happens while on the charger?