Hi and thank you for your question. I am a verified Expert and I am happy to help you today. It may be due to over use of your groin muscles or it could be due to a problem in your lower back. There are some nerves in the pelvic area that can be affected when there is pressure ( irritation or swelling) placed upon them.
The best thing to do is to see your Doctor so he can examine you, isolate the cause, and offer treatment.
In the mean time... if it is muscle or arthritic in nature, it should respond well to anti inflammatories such as Ibuprofen ( per package directions) provided this is not contraindicated in your case ( doesn't conflict with anything you currently take)
Thank you Camille. I will take your advice. I do have some pain in the lower back.
Thanks. I appreciate your help.