Hi thanks for contacting HCM... In groin region pain and discomfort can be from hernia but after examination you have no palpable mass or no swelling ....So here chance of hernia very less I would like to say.... USG abdomen done in your case as it is more sensitive then x ray.... There might be colitis like infection or small stone if pain constructing .... You might needed antibiotic and omeprazole for that.... Junk foods and non veg food avoided for few days.... If still no cause clear then CT scan like higher investigation done .... Sometime if you have history of trauma or any unaccoustemed situation then muscular strain could be problem... Consult physician for this. Take care