Lump in the scrotum
near testis has to be investiagated.
Apart from clinical examination,test like Colour doppler of the scrotum has to be done to exclude epididymal cyst
,Inguinal hernia etc.
Please consult another Urologist/surgeon and get Colour doppler of scrotum for correct diagnosis.
Till then take Antibiotic and anti inflammatory drug
Wish you good health