Strain when squatting

[irish27]

Hi Mark,

Everytime I squat now I seem to have a bit of strain in the following area:

http://www.aidmygroin.com/_img/anterior_hip_muscles.jpg

Either the Abductor Magnus or Abductor Brevis, or in there anyway. Is there any particular form fault that would cause strain to appear in this area when squatting? What would you advise?

[Mark Rippetoe]

This is an incredibly non-specific picture.