Welcome to health care magic.
1.If surgeon has opened and said it is normal means there is no torsion / ruptured testis.
2.But coming to the symptoms you are facing and feeling needs to be evaluated.
3.The possible cause of post operative changes can be think of like oedema, collection of fluid, infective process.
4.In this case needs to reexamine and if necessary an
ultrasound scrotum - the scan will gives an exact condition of testis, blood supply, any fluid collection, features of oedema in the subcutaneous plane, any infective changes.
5.After that needful treatment can be indicated. Good luck.
Hope i have answered your query.
Any thing to ask do not hesitate. Thank you.