How do the realign the knee from slipping. does that require surgery?

Depends what slips?: A subluxating or dislocating patella is treated with various nonoperative and operative options. Most can be successfully treated with a special brace and therapy. Surgery to realign the patella can invvolve any/all of the following: medial patellofemoral ligament (mpfl) reconstruction, lateral retinacular release, and distal tibial tubercle realigning osteotomy.

Yes: There are a couple of different types of surgeries that can be done if all conservative measures have been exhausted. Have they? Have you been to a physician that thoroughly accessed your alignment, your leg length, your feet, your lower extremity and core muscle strength? If you have and all of these issues have been addressed then consider surgery.