Hello ma'am,
Which knee operation you have gone through, please clarify and mention the date of surgery also.You need to do graded knee and core muscle strengthening exercises along with knee ROM exercises.I can guide you further.
Next Steps
consult a Physiotherapist.A physio is the right person to guide you properly.
Health Tips
take Ice pack for 4-5 times a day for 15 mins..do ROM and strengthening exercises as prescribed by physio .