Thank you for the query.
Lower abdominal pain
radiating to the groin, testicle or inner thigh is very characteristic symptom of urinary tract stones (if the pain appears suddenly) or urinary tract infection
(the pain appears gradually and is more constant). With both conditions burning while urinating and frequent urinating can be present.
Other possible reasons of such symptom are testicle inflammation, epidydimis, prostate inflammation
(especially if the pain radiates also to the rectum).
I suggest you to visit your doctor and have urine analysis and abdominal ultrasound
performed. Antibiotics might be necessary.
Hope this will help.