And if you decide to leave it untreated, this can lead to physical problems later. Studies have shown that left untreated, knee weakness, arthritis, and other structural damage may lead to further damage. Of course, in this situation, running and even walking will no longer be an option.
Well now there is another option: Prolotherapy
Prolotherapy is a natural non-surgical method of assisting the body to heal injured or weakened joints, ligaments and tendons. With Prolotherapy, the weakened areas are injected with a proliferant that stimulates the growth of healthy, strong tissues. As the tendons and ligaments grow stronger and more vibrant, the pain is alleviated and one can return to their normal activities be it skiing, tennis or any other sport.
Prolotherapy is a lot less invasive than surgery. It also has much less risk and there is not rehabilitation that one usually needs following surgery. It can usually fix most tears of the ACL. Only in the case of a complete ACL tear is Prolotherapy somewhat limited.