<s>[INST] Hi, My name is Leeanne. I have had a hard lump grown on the inside of my left knee. It protrudes out more when I bend it. Diameter 2cms. I did have xrays on it years ago because I had pain.I had played a lot of sport years ago & still to this day I bend down a lot in my work. I have even in my insteps on my feet have lumps on them due to driving continuesly. Just reading & looking up Bursitis. I know its not a fluid sac because it feels like a bone. Thankyou . [/INST] Hello I have studied your case. There is possibility of bursa leading to knee swelling. MRI or ultrasound knee will help in diagnosis. If bursa is painful surgical excision is treatment. If you want temporary relief intramural injection can be given which will give long term pain relief. There may be recurrence of pain after injection. Consult your doctor for investigation and treatment. Hope this answers your query. 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. </s>