The foot only contains one naturally occurring bursal sac between the Achilles tendon and the heel bone, which protects the Achilles from the pressure against the heel bone during ambulation. However, shoes may put pressure on this bursa. The bursa might also incur trauma from walking on hard ground. And, though they are not naturally occurring, bursa sacs can also form, and become inflamed, in other parts of the foot, including the bottom of the heel, and the metatarsal plate, the outside of the foot below the fifth toe, and so on.
Bursitis is caused by overuse or excessive pressure on the joint, injury, infection, or an underlying condition, such as osteoarthritis, rheumatoid arthritis, gout, pseudogout, or ankylosing spondylitis. When bursitis is caused by an underlying condition, the condition must be treated along with the bursitis. When bursitis is caused by infection, called septic bursitis, medical treatment and antibiotics are necessary.
Where the tendon joins the calcaneal bone, friction can cause the spaces between the tendon, bone and skin to swell and inflame with bursitis. This constitutes a calcaneal bursa. Apart from swelling over the back of the heel, you?ll feel acute tenderness and pain when you move it or even apply light pressure. Your swollen heel may look more red than the other one, and the swelling is often so hard it can feel like bone, partly because it sometimes is, as a bony overgrowth can occur in chronic cases.
The doctor will discuss your symptoms and visually assess the bones and soft tissue in your foot. If a soft tissue injury is suspected, an MRI will likely be done to view where and how much the damage is in your ankle. An x-ray may be recommended to rule out a bone spur or other foreign body as the cause of your ankle pain. As the subcutaneous bursa is close to the surface of the skin, it is more susceptible to septic, or infectious, bursitis caused by a cut or scrape at the back of the heel. Septic bursitis required antibiotics to get rid of the infection. Your doctor will be able to determine whether there is an infection or not by drawing a small sample of the bursa fluid with a needle.
Non Surgical Treatment
The patient with retrocalcaneal bursitis should be instructed to apply ice to the posterior heel and ankle in the acute period of the bursitis. Icing can be performed several times a day, for 15-20 minutes each. Some clinicians also advocate the use of contrast baths. Gradual progressive stretching of the Achilles tendon may help relieve impingement on the subtendinous bursa and can be performed in the following manner. Stand in front of a wall, with the affected foot flat on the floor. Lean forward toward the wall until a gentle stretching is felt within the ipsilateral Achilles tendon. Maintain the stretch for 20-60 seconds and then relax. Perform the stretches with the knee extended and then again with the knee flexed. To maximize the benefit of the stretching program, repeat the above steps for several stretches per set, several times daily. Avoid ballistic (ie, abrupt, jerking) stretches. Other treatment options are microcurrent therapy and corticosteriod injection into the retrocalcaneal bursa. If conservation treatment fails then surgery is indicated.
Bursectomy is a surgical procedure used to remove an inflamed or infected bursa, which is a fluid-filled sac that reduces friction between tissues of the body. Because retrocalcaneal bursitis can cause chronic inflammation, pain and discomfort, bursectomy may be used as a treatment for the condition when it is persistent and cannot be relived with other treatments. During this procedure, a surgeon makes small incisions so that a camera may be inserted into the joint. This camera is called an arthroscope. Another small incision is made so that surgical instruments can be inserted to remove the inflamed bursa.
Maintain proper form when exercising, as well as good flexibility and strength around the ankle to help prevent this condition. Proper stretching of the Achilles tendon helps prevent injury.