24 years diagnosed with acl partial tear,mild contusion in both menisci ,moderate joint effusion, before month doctor removed fluid and give me a hyaluronic injection, now there's a pain again, is prp injection good for me? what is the best treatment?

Not feasible to provide precise answers, as this appears a challenging orthopedic issue, and from your post, seems to be a chronic problem. You might discuss this in detail with the orthopedic surgeon, and if necessary, get additional opinions, as several potential options could be considered.

without looking at your MRI and examining you a specific advice is not possible. Suggest see your MD again and follow his/her advice.