I didn't remember having pain down the inner thigh after my release but did have pain at the groin (where my release was done. It's possible, though, that your leg might have been moved or held in a way during surgery that is causing pain. It's also possible that some of the other muscles aren't use to taking more of an initiative and they get tired and sore more easily. I'd ice wherever it hurts, talk to your PT (if you're seeing one) and give it a bit of time. If it's still hurting in a week or 2 (assuming it's not off the chart, steal your breath away sort of pain) I'd check in with the surgeon. When is your follow up appt?