Hello there community somewhat of a new user here...
I know I probably messed up some setting and, but whenever I extrude and scale vertices they move inwards of the model I dont know what I did or I am doing wrong but instead of going upwards they go up and inside the model... 
Any help is appreciated 

[![screenshot][1]][1]


  [1]: https://i.sstatic.net/CPTHU.png