Achilles tendonitis occurs when the Achilles tendon, which connects the calf muscles in the lower leg to the heel bone, becomes inflamed causing pain and swelling symptoms.
Achilles tendonitis (also known as Achilles tendinopathy, tendinitis or tendonosis) is classified as an overuse injury. If left untreated it can become chronic (long-term), requiring more intensive treatment. Achilles tendonitis can also increase the risk of sustaining an Achilles tendon rupture (tear).
Signs and symptoms
The onset of the symptoms of Achilles tendonitis tend to be gradual, usually developing over a period of several days, or even weeks. Symptoms may include:
- Pain - this may be mild at first and may only be noticeable after exercise. Over time the pain may become constant and severe
- Stiffness - this is usually relieved by activity
- Sluggishness in the leg
- Tenderness - particularly in the morning and most commonly felt just above where the tendon attaches to the heel bone
Factors that can lead to the development of Achilles tendonitis include:
- Tight or weak calf muscles
- Rapidly increasing the amount or intensity of exercise
- Hill climbing or stair climbing exercises
- Changes in footwear - particularly changing from wearing high-heeled shoes to wearing flat shoes
- Wearing inadequate, inappropriate or worn out shoes for the sporting activity being undertaken
- Not adequately warming up and stretching prior to exercise
- A sudden sharp movement that causes the calf muscles to contract and the stress on the Achilles tendon to be increased. This can cause the tendon fibres to tear.
- Older age
- A side-effect of a certain type of antibiotics called fluoroquinolones.
Initial treatment of Achilles tendonitis includes:
- Rest - to avoid further injury to the area
- Ice - to reduce inflammation
- Elevation - to reduce swelling
- Bandaging/strapping - to support the area and restrict movement of the tendon
- Anti-inflammatory medications to reduce pain and inflammation. (Cortisone (steroid) injections to reduce inflammation are not usually recommended as they may weaken the tendon and increase the risk of rupture).
Physiotherapy plays an important role in the treatment of Achilles tendonitis. This generally focuses on two main areas – treatment and rehabilitation. Treatment may involve such techniques as massage, ultrasound, acupuncture and gentle stretching. Rehabilitation involves the development of an individualised recovery programme, the most important aspect of which is strengthening. Strengthening of the muscles surrounding the Achilles tendon helps to promote healing in the tendon itself. Strengthening is achieved through the use of specific exercises, which will be taught by the physiotherapist. One such exercise is eccentric loading (sometimes referred to as "heel drops", which involve lengthening the calf muscle and tendon while under tension or load). It is common for the rehabilitation programme to take up to three months.
Podiatry, including gait analysis and the fitting of orthotic devices to support the foot and reduce stress on the tendon, may be recommended.
For cases of Achilles tendonitis that do not respond to initial treatment, casting or splinting of the affected foot may be recommended to allow it to rest completely.
Surgery In cases of severe, long-term Achilles tendonitis the sheath may become thick and fibrous. In these cases surgery may be recommended. Surgery aims to remove the fibrous tissue and repair any tears in the tendon. A cast or splint will be required after the operation and a recovery programme including physiotherapy, specific exercises and a gradual return to activity will be planned.
The following measures can significantly reduce the risk of developing Achilles tendonitis:
- When beginning an exercise regime, start slowly and gradually increase duration and intensity
- Adequately stretch and warm up prior to exercise
- Warm down and stretch after exercise
- Choose footwear carefully and use footwear appropriate to the sport being undertaken
- Use orthotic devices in footwear to correctly support the foot
- Exercise within fitness levels and follow a sensible exercise programme
- Develop strong, flexible calf muscles by doing eccentric exercises (heel drops) and stretching daily.
Mayo Clinic (2016). Achilles tendinitis (Web Page). Rochester, NY: Mayo Foundation for Medical Education and Research. http://www.mayoclinic.org/diseases-conditions/achilles-tendinitis/basics/definition/con-20024518 [Accessed: 03/05/17]
Saglimbeni, A.J. (2016) Achilles tendon injuries (Web Page). Medscape Drugs and Diseases. New York, NY: WebMD LLC. http://emedicine.medscape.com/article/309393-overview [Accessed: 03/05/17]