18/01/2026
Achilles tendon pain is usually caused by overuse and repetitive strain, common in runners or those starting new intense activities, but also by sudden injury, tight calf muscles, poor footwear, or underlying health conditions, leading to inflammation (tendinitis) or tears, often felt as stiffness and pain near the heel, worsening with activity.
Common Causes
Overuse/Repetitive Strain: Sudden increase in exercise intensity, duration, or frequency, especially in sports with jumping (basketball) or running.
Improper Footwear: Worn-out, non-supportive, or ill-fitting shoes, or wearing high heels too often.
Tight Calf Muscles: Inflexible calves put extra stress on the tendon.
Poor Warm-ups: Not preparing muscles and tendons for activity.
Hard Surfaces: Running or jumping on hard or uneven ground.
Sudden Injury: A direct blow or unexpected downward movement.
Risk Factors
Body Mechanics: Flat feet, high arches, or feet that turn in/out too much.
Health Conditions: Diabetes, rheumatoid arthritis, being overweight.
Lifestyle: Smoking, prolonged standing, sedentary behavior.
Medications: Certain antibiotics (fluoroquinolones).
Age/Hormones: Middle-aged adults, or women experiencing menopause (due to estrogen drop affecting collagen).
Symptoms
Pain and stiffness in the back of the leg/heel, worse after activity or upon waking.
Swelling or thickening of the tendon.
Pain that worsens with physical activity.
Limited range of motion when flexing the foot.
A sudden "pop" and intense pain could signal a tear (rupture).