Permanence of menisci injuries depend on where they're located. - Single-trauma injuries to the outer third (red zone) can heal because it has sufficient blood supply. - The inner third (white zone), however, will not because of the lack of circulation. - The middle third (red-white) zone can heal but it might not fully recover or take a while longer. Damage to the inner and middle thirds of the meniscus may require surgery to reduce joint pain and swelling. Surgical options include repair or removal of all or part of the cartilage (i.e. total and partial meniscectomy). Degenerative meniscus tears also won't heal naturally and may develop into arthritis with age. If you're unsure, I highly recommend seeking a professional's medical advice.