Bursitis accounts for 0.4% of all visits to primary care clinics. The most common locations of bursitis are the subdeltoid, olecranon, ischial, trochanteric, and prepatellar bursae. The incidence of bursitis is higher in athletes, reaching levels as high as 10% in runners. Approximately 85% of cases of septic superficial bursitis occur in men. A French study aimed at assessing the prevalence of knee bursitis in the working population found that most cases occurred in male workers whose occupations involved heavy workloads and frequent kneeling. Mortality in patients with bursitis is very low. The prognosis is good, with the vast majority of patients receiving outpatient follow-up and treatment.
The retrocalcaneal bursa can become inflamed as the result of another condition, such as damage to the Achilles tendon, osteoarthritis, rheumatoid arthritis, gout, and pseudogout. In these instances, the treatment for bursitis must accompany treatment for the underlying condition. Septic retrocalcaneal bursitis, which is caused by an infection, is uncommon. Infection can reach the bursa through a cut, puncture, a blister, or even an insect bite. It is possible to have septic bursitis without an obvious opening. In these cases the superficial wound may have healed quickly, but still allowed bacteria into the bursa.
Symptoms of bursitis usually occur after rest and relaxation. Upon activity there is usually more intense pain in the area of the bursa. The common areas to have a bursitis in the foot are in the bottom of the heel, behind the heel near the attachment of the Achilles Tendon as well as along the side of a bunion. A bursa may also form in multiple areas especially along the metatarsal heads, or "ball" of your foot. You may actually feel the sac like fluid when rubbing the area of pain.
When a patient has pain in a joint, a careful physical examination is needed to determine what type of movement is affected and if there is any swelling present. Bursitis will not show up on x-rays, although sometimes there are also calcium deposits in the joint that can be seen. Inserting a thin needle into the affected bursa and removing (aspirating) some of the synovial fluid for examination can confirm the diagnosis. In most cases, the fluid will not be clear. It can be tested for the presence of microorganisms, which would indicate an infection, and crystals, which could indicate gout. In instances where the diagnosis is difficult, a local anesthetic (a drug that numbs the area) is injected into the painful spot. If the discomfort stops temporarily, then bursitis is probably the correct diagnosis.
Non Surgical Treatment
Your health care provider may recommend the following treatments. Avoid activities that cause pain. Ice the heel several times a day. Take nonsteroidal anti-inflammatory medications (for example, ibuprofen). Try over-the-counter or custom heel wedges to help decrease the stress on the heel. Try ultrasound treatment during physical therapy to reduce inflammation. Use physical therapy to improve flexibility and strength around the ankle, which can help the bursitis improve and prevent it from coming back. If these treatments don't work, your health care provider may inject a small amount of steroids into the bursa. After the injection, you should avoid stretching the tendon too much because it can break open (rupture). If the condition is connected with Achilles tendinitis, casting the ankle for several weeks to keep it from moving can be effective. Very rarely, surgery may be needed to remove the inflamed bursa.
Surgery is rarely done strictly for treatment of a bursitis. If any underlying cause is the reason, this may be addressed surgically. During surgery for other conditions, a bursa may be seen and removed surgically.
Maintain proper form when exercising, good flexibility, and strength around the ankle to help prevent this condition from arising. Proper stretching of the achilles tendon helps prevent injury.