Un-weighted painted vertices moving with bone I am trying to rig my model and need to weight paint the bones to the proper body parts. I chose to parent my model to the rig using empty groups, but after adding weight paint to, for example, the leg, this occurs: https://gyazo.com/7a71be9641c3366da4dde5027e725459 .

Could this be because I haven't finished weighting all of the bones? Why is this occurring and how do I fix it? I apologize if this has already been asked.
Try checking to see if any child bones (bones which move when you move the "parent" bone) of the bone you are moving have weight on the problem area.