Legs 
Legs in a dream symbolize your control over your life's path and are strongly connected to your sense of self. Legs give a person the ability to stand, walk, run, play sports, or various other possible activities.
To dream that you have lost your legs or become crippled indicates that you are afraid of losing control over the direction of your life. You may be struggling with a lack of courage or the ability to stand up for yourself.
To dream of losing just one leg, or having one leg shorter than the other, indicates a lack of balance in your life. You may also be pursuing a path half-heartedly, still carrying doubts about your choices.
Standing up on two legs is often cited as a symbol of the difference between a human and an animal.
To dream that you cannot stand on your legs may also represent a feeling that you have lost a high position in life. You may have become controlled by animal desires, or you may feel that others are treating you with less respect than you deserve.
To dream that you have more than two legs represents divided interests. Each leg may try to pull you in opposite directions and you feel torn between possible actions. You may have taken on too many tasks at work and are struggling to keep up with conflicting responsibilities.
To dream of crossed legs symbolizes a barrier between you and others. This barrier may be emotional or intellectual, indicating closed mindedness.
Knees
To dream of your knees represents a form of assistance and guidance that will be bestowed on you. It also refers to any emotional feeling you may have, as well as feelings of incompetence and issues of influence and control. It further suggests you may be overwhelmed with your daily responsibilities and obligations.
Ankle
To dream about your ankles signifies that you require some guidance and assistance in life. You should inquire of yourself where you'd like to go. You may be at a turning point in your waking life. You'll soon face a pivotal decision, so it is important that you take your time and think things through carefully before acting.
To dream of an injured ankle represents a minor setback. Try not to worry, this will soon correct itself.
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