What can I do for swelling ,sound and movement ?

Hello doctor I have a query relating my knee actually it has swelling and I has this as a major problem now but in the first time I got hurt in this knee is something 3 years ago and since then I hurted 2-3 times on this knee and when Italk to the doctor they said that it is a soft ligament issue and ligament is broken. And it also swelling it up lifted from it on place when I move my leg and come to its initial place when I normal it