Incision opened up after surgery for testicular torsion?

Ask your doctor...: Asking the surgeon or her/his associated is best to get the answer to your situation since s/he know how the surgery was done and what may be expected. In general, incision separation for such surgery is superficial and should likely healed by itself by keeping it as clean & dry as possible with no need for re-closure. If what described does not ease anxiety, seek evaluation & counseling.