My 5 Year Old Has Been Fighting The Viral Infection

My 5 year old has been fighting the viral infection hand foot and mouth sense i noticed the blisteres in her mouth on Wednesday. Yesterday was terrible by far. Today she is tryig to be happy and get back to her self but still has a couple ulcers in her mouth along her tongue. However my concern is she keeps crying out in pain occasionally and says her jaw hurts. Her left side of her jaw area looks like it may be swallon some. Is that part of this virus or could it be something else?