My photos keep on disapppearing whenever I power-off or reboot my phone. Help?

[BestaIsBest]

Whenever I power-off my phone (or reboot it) I loose any photos I have on there. Is there a way I can get them back?

 

[B. Diddy]

Welcome to Android Central! Which ZTE phone? Are these photos taken by the Camera app, some other app, or downloaded from the web?