hi thank you for consulting hcm sir going through ur complaints it seems you haven t been completely evaluated ,sir you didnt mentioned what did they drained from your swollen knee,generally meniscal tears do present like that ,swelling reappears after short time without any pain,get an MRI done for your knee...with your presenting complaints and signs like warmth its jus an inflammation where tou l feel itchy, need not worry for dat,as it will subside once the swelling subsided,but I think you have to run MRI to unveil your dbts about wat exactly is wrong with your knee. thank you