Wat is it when u crack ur ankles constantly?

Cracking - need inf. Cracking can suggest movement of tissues. This can be bone slipping, tendons sliding or some other movement. Which side of the ankle? Is it both ankles or one ankle? Is there swelling also? Is the ankle collapsing? Is there pain when this happens? Can you feel anything when thsi happens? Can it be either active or passive motion? We will need more information.
Cartilage wears out. Millie: that popping or cracking sound in your joints is usually the sound of cartilage deteriorating. It could be due to previous trauma or arthritis setting in. Best to have it looked at by a podiatrist.