Hi,Thanks for your query. After going through your query I came to know that your left feet is having pain after you got operated for torn meniscus .It may be possible due to operation your venous drainage of left lower limb is somewhat disturbed. Due to this edema of feet has occurred. Foot has become painful.Treatment of it is elevation of limb on pillows during resting periods, active toe movements and analgesic such as ibuprofen for pain relief.You can discuss with your treating Doctor about it. I do hope that you have found something helpful. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care.