Thank you for the query.
Unfortunately mentioned by you home remedies
may not be effective and medical attention seems necessary. It is because in your knee most likely there is a fluid which needs to be drained. Otherwise, inflammation can destroy the joint. Moreover, antiinflammatory medicines and antibiotics might be necessary. Knee ultrasound
seems to be necessary as well.
At home you should apply ice in short periods
(like 5 minutes), put your legs upper.
Hope this will help.