Thanks for your query,based on the facts that you have posted it appears that you have Enlarged prostate
and was operated for Bilateral Inguinal hernia few years back and have noticed swelling in the left groin .
The swelling in left inguinal region could be due to recurrent inguinal hernia secondary to enlarged prostate .
Please consult qualified Urologist
for clinical evaluation and to confirm the diagnosis,
If confirmed you need to get endoscopic surgery
of resection of prostate (TURP) and hernia repair done .
Both these procedures can be done in same sitting under spinal anaesthesia