“Most commonly, the Achilles ruptures when there is a sudden, forceful movement of the foot downward against resistance, such as when an individual pushes off the foot with great force to jump. This often occurs in sports like basketball, tennis, or football.
Patients with an Achilles tendon rupture will often complain of a sudden snap in the back of the leg. The pain is often intense and patients will describe it as if being shot.
With a complete rupture, the individual will only be able to ambulate with a limp. Swelling around the lower calf may occur. Patients may offer a history of recent sudden increase in exercise or intensity of activity.
Risk factors for Achilles rupture include poor conditioning, corticosteroids medications (either taken by mouth or injected near the tendon), fluoroquinolone antibiotics (ciprofloxacin, levofloxacin), and overuse.”