<s>[INST] Hi, I met with an accident a week ago. my knee was injured as i fell on road. now what i see is below the knee my skin has become green in color and near the foot also I got little swelling with green color.Is is because I didn t got TT shot or if there is any-other reason what is that. Suggest me what should I do. [/INST] Hi, The greenish discoloration is clot of blood as a result of injury in the knee. The swelling below is part of same process. It has nothing to do with TT shot. Do not worry, both the problems will go away with time. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Gopal Goel, Orthopaedic Surgeon </s>