My Minecraft character cannot turn its head

All you need to do is go into the settings under the help & options menu, then go to control and restore the game sensitivity back to 100%. Problem solved.

I keep seeing the same response, "go to help & options menu...". Where is the help & options menu? I'm playing on an android tablet. There is a settings menu in the game, but no option to reset to original settings. Manually setting the sensitivity to 100%
did not work either. What else can I try?

All you need to do is go into the settings under the help & options menu, then go to control and restore the game sensitivity back to 100%. Problem solved.

Deleting the Gamertag and re-downloading it really won't do anything as the problem seems to be with the game, not the GamerTag. It is possible your save file might be corrupted, in which case, your only option would be to delete it. Have you tried playing
on a different save file with that GamerTag?

Presuming this is a recurring issue and has no relation to the controller, you can try recovering that gamertag. Delete the gamercard from your Xbox by going to your system storage and, after selecting the profile, selecting "delete". Next, click "download
gamertag" after pressing the guide button (the one with the Xbox symbol) on a controller that isn't signed in. Enter your account's information and wait for the download. Once your account is downloaded, try Minecraft again.

@TIDY BOY JAMI As far as my understanding goes it exaggerates your head movements so a slight turn to the left will turn you character's head all the way to the left.