Inflammation of your Achilles tendon (Achilles tendinopathy) might cause pain behind the ankle, going down to the back in the heel. Ice. Applying ice towards the afflicted place can assist lessen inflammation and alleviate pain. You could test rolling your foot around a cold water bottle or applying an ice https://specialistsphere.com/foot-and-ankle-pain-explained-common-conditions-diagnosis-and-effective-treatments/