Suggest Treatment For Stiffness And Pain In The Knee

so almost a year ago i injured my e very badly and i never got it checked out as the injury was aquired on a trip out of state. i was skipping down a hill and i tripped and rolled and my knee was scratched and very stiff afterwards and i had major pain could barely walk but i didnt get it checked out because i wanted to see if it wouod go away and it never did. and i still have pain in my lnee so im thinking i should probably get it checked out but anyways i just noticed a pulsing sensation in my knee by my meniscus and i dont know if it its serious or not and it isnt causing any pain and also my knee tends to butn aometimes if that makes sense