Achilles pain often appears after a change in training load, hills, speedwork, shoes, or recovery. The useful first step is not guessing the diagnosis; it is noticing the pattern and reducing the aggravating load.
Warning signs
Pain that worsens as you run, changes your stride, causes swelling, or is worse the next morning deserves attention. A sudden pop, major weakness, or inability to push off needs prompt medical assessment.
Adjust the load
Temporarily remove the workout that provokes symptoms, especially sprints and steep hills. Keep movement that is comfortable, and avoid using pain medication to hide a load that your tendon cannot tolerate.
Return gradually
A return should progress from ordinary walking to easy running, then distance, then hills and speed. If pain is clearly worse later that day or the next morning, the previous step was too much.