Thank-you very much for the information. With that decription you gave I could count it down to an injury I had a few years ago where I damaged my foot/leg But that was down the left side of my body. I think the best think to do is see a medical proffesional for more advice. But what you have given me a good a good start, thanks
Not a lot of information, but this could be a tight psoas muscle or iliopsoas. When these important muscles are too tight, you tend to get groin pulls and other debilitating injuries, so physical therapy before it gets worse would be the smart thing to do, assuming this is the problem.
If it was a hernia, it would usually bother you when standing.