Why does my groin area click or pop when i open my leg outward?

Tendon: Snapping hip syndrome is a common phenomenon where the iliopsoas tendon snaps over a normal prominence on the upper end of your femur or leg bone.

Few choices: You may have a tendon snapping over the joint, or a torn labrum (cartilage) inside of the joint.

Hip: Hip pathology often causes symptoms referred to the groin, donut sounds like you may have an issue withdraw hip on that side. I would not hesitate to be seen for it.

Click: The noise could come from hip joint, but can also come from tendons or ligaments. Although you click do you have other symptoms? Pain swelling etc.