Answer by  
                                                                                          sdnco (264)
                                                            
                          
                          
                                                          A soft tissue know in your leg could come from many sources. A muscle knot is from the muscle not relaxing.  It could stem from scar tissue from a previous injury, a cramp, a damaged ligament or tendon or a muscle sprain.  It could also be a tumor.  Try massage and warm compresses.  If that doesn't help, see a doctor.