Squat issues

[bippal]

Having started lifting again in a serious way about a month ago, I still have a problem I had way back in highschool during football. When I squat, my left shoulder starts hurting very badly. I usually can feel it start the minute I put my hands on the bar behind my neck. I don't have any problems on any shoulder exercises, although I avoid behind the back lat pulls or shoulder presses just in case. Is there a way I can still get the squat in all of its compound glory?

 

[Nitszo]

Try lunges? or do squats on the calve raising machine, squat machine?
Front Squats? hacks squat machine? theres ways around it bro
I cant do a normal squat, i have to do wide stance sumo type.. fucked.

 

[DADAWG]

stretch contsantly to increase range of motion . widen hands to lessen the stress and change the angle.