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Pain in the scrotal region could be due to many causes, commonest being epididymo-orchitis
of variable severity. It could be due to tight inner wear or varicocele
. If the pain is mild you can wait to see if it goes away on its own, if it is persisting you have to consult an Urologist
. If the pain is severe, then it is a surgical emergency, as it can occur due to torsion of the testis which needs immediate surgical attention. You may need a Colour Doppler Study of the scrotum
to get a correct cause of your pain.