Thanks for writing to us.
Pain in left testicle and groin when stopping urination might be suggestive of an infection in the region like- infection of the epididymis
, bladder, or seminal vesicles.
Seeking the help of a urologist
at this point will be helpful to find out the infection early. Systemic antibiotics might be needed for the treatment.
It is best to maintain good hygiene till the infection is cured properly.
I hope this answers your query.If you have any questions I will be happy to answer.
Please close the query if you have no other questions.
Wishing you good health...