extra knobbly knees

these are my knees, not perfect, but theyre mine.

Yesterday i went to the doctor and got told "your problem is the way you were made", my leg is normal from the hip to the knee, but my bone then twists out at the knee and doesnt rest properly in its socket, giving me knee problems, ankle problems, lower back problems, making it almost impossible to do exercise and other such things a 21 year old should be doing.
So i have two options:
1. They saw my leg bone just below the knee and then reset (glue) it back together.
2. physio
so folks...what do you reckon?