<s>[INST] I recently had a cast removed off my right leg and a couple days later i noticed a hard lump in my mid calf that feels like a horrible bruise sometimes it is too painful to walk, it is too painful to touch and it seems to go from one large lump to 2 smaller lumps then I had multiple small lumps now its back to one large lump it is not red or hot to touch, just looks like a black and blue mark [/INST] Well, I'm really sorry to inform you that you got some kind of trauma followed by some infection in the region; could be some chronic pressure effects or ischemia... For temporary relief you may apply ice/cold compress but do not really rub it as it might get infected or spread infections! And, you have to take oral antibiotics like erythromycin 500 mg four times a day for 5 days. I also suggest you to go for an FNAC and ultrasound of the lumps for confirmation and to relieve your concerns! Hope this answers your question. If you have additional questions or follow-up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health. </s>