During the physical exam, your doctor will inspect your lower leg for tenderness and swelling. Your doctor might be able to feel a gap in your tendon if it has ruptured completely.
The doctor might ask you to kneel on a chair or lie on your stomach with your feet hanging over the end of the exam table. He or she might then squeeze your calf muscle to see if your foot will automatically flex. If it doesn't, you probably have ruptured your Achilles tendon.
If there's a question about the extent of your Achilles tendon injury — whether it's completely or only partially ruptured — your doctor might order an ultrasound or MRI scan. These painless procedures create images of the tissues of your body.