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.
For the most part, it is a genetic condition. You develop it by inheriting a foot type that is prone to the mechanical irritation that leads to the problem. If you have this particular foot type and wear shoes that rub and irritate the back of the heel bone (calcaneus) where the Achilles tendon attaches, then you are even more likely to develop this type of bursitis. The contributing factors include a supinated foot type, a heel bone with a prominence (or pointed shape that stick out toward the tendon) at the back, a tight Achilles tendon (referred to as Equinus by doctors), and a high arch. All of these factors simply make it more likely that the back of the heel will press against the shoe and rub. As the tendon gets rubbed the wrong way, the bursa starts to develop and fill with fluid. This response is really your body’s way of protecting the tendon from damage, but it backfires. The friction from all that rubbing causes the bursa to become inflamed and swell. This causes the bump to become red, hot and stick out even further. Much like a sore thumb, it then gets irritated by even the softest shoes.
Your heel may feel more sensitive to the cold and ache in cold and damp weather due to impaired circulation. These symptoms are often the result of failure to treat the injury properly from the outset and overicing.
After you have described your foot symptoms, your doctor will want to know more details about your pain, your medical history and lifestyle, including whether your pain is worse at specific times of the day or after specific activities. Any recent injury to the area. Your medical and orthopedic history, especially any history of diabetes, arthritis or injury to your foot or leg. Your age and occupation. Your recreational activities, including sports and exercise programs. The type of shoes you usually wear, how well they fit, and how frequently you buy a new pair.
Non Surgical Treatment
Gradually progressive stretching of the Achilles tendon may help to relieve impingement on the subtendinous calcaneal bursa. Stretching of the Achilles tendon can be performed by having the patient place the affected foot flat on the floor and lean forward toward the wall until a gentle stretch is felt in the ipsilateral Achilles tendon. The stretch is maintained for 20-60 seconds and then is relaxed. Achilles stretch 1. The patient stands with the affected foot flat on the floor and leans forward toward the wall until a gentle stretch is felt in the ipsilateral Achilles tendon. The stretch is maintained for 20-60 seconds and then is relaxed. Achilles stretch 2. This stretch, which is somewhat more advanced than that shown in Images 1-2, isolates the Achilles tendon. It is held for at least 20-30 seconds and then is relaxed. To maximize the benefit of the stretching program, the patient should repeat the exercise for multiple stretches per set, multiple times per day. Ballistic (ie, abrupt, jerking) stretches should be avoided in order to prevent clinical exacerbation. The patient should be instructed to ice the posterior heel and ankle in order to reduce inflammation and pain. Icing can be performed for 15-20 minutes at a time, several times a day, during the acute period, which may last for several days. Some clinicians also advocate the use of contrast baths, ultrasound or phonophoresis, iontophoresis, or electrical stimulation for treatment of calcaneal bursitis. If the patient’s activity level needs to be decreased as a result of this condition, alternative means of maintaining strength and cardiovascular fitness (eg, swimming, water aerobics) should be suggested.
Surgery to remove the damaged bursa may be performed in extreme cases. If the bursitis is caused by an infection, then additional treatment is needed. Septic bursitis is caused by the presence of a pus-forming organism, usually staphylococcus aureus. This is confirmed by examining a sample of the fluid in the bursa and requires treatment with antibiotics taken by mouth, injected into a muscle or into a vein (intravenously). The bursa will also need to be drained by needle two or three times over the first week of treatment. When a patient has such a serious infection, there may be underlying causes. There could be undiscovered diabetes, or an inefficient immune system caused by human immunodeficiency virus infection (HIV).