Plantar Fasciosis: Pain in the heel, typically due to compromised blood flow to and from the foot's plantar fascia and a corresponding buildup of metabolic byproducts.
Plantar fasciosis is a foot condition characterized by heel pain and pain in the plantar fascia—the strong and dense connective tissue structure on the sole of the foot that spans the foot arch. This condition has historically been called plantar fasciitis because it was believed that plantar fascia inflammation was the principle underlying cause. Plantar fasciosis is a more accurate name for this condition because it actually involves tissue degeneration of the plantar fascia—microtears and cell death—not inflammation.
The plantar fascia helps the bones of the foot absorb gait-related shock. It also holds the toes firmly on the ground as the body passes over the foot. Plantar fasciosis most commonly causes pain or discomfort at the point where the plantar fascia attaches to the calcaneus, or heel bone. Active men between the ages of 40 and 70 are most commonly affected by this health problem.
Plantar fasciosis, sometimes known as calcaneal spur syndrome or calcaneal enthesopathy, can involve stretching, tearing, and degeneration of the plantar fascia at its attachment site. In some cases, heel pain at this attachment site may be caused by other health problems, including certain types of arthritis. A physician may run several tests to help determine the true cause of the plantar fascia pain and the most effective treatment methods to resolve the complaint.
Signs & Symptoms
Heel pain is the most common symptom associated with plantar fasciosis. The heel pain may be most severe in the morning (with the first steps after getting out of bed) or with walking after prolonged periods of sitting or standing. Pain is most common under the heel bone, but the pain may also be felt in the foot arch or on the outside aspect of the foot.
Some of the other most common signs and symptoms associated with plantar fasciosis include:
- Impaired ability to walk
- Tenderness on the bottom of the heel
- Mild swelling and redness in the affected area
Inappropriate footwear is the No. 1 cause of plantar fasciosis. Shoes that have toe spring and a tapering toe box hold the big toe in an adducted and extended position. In this position, the abductor hallucis muscle—the muscle responsible for moving the big toe away from the foot’s midline—pulls on a foot structure called the flexor retinaculum, which in turn may restrict blood flow through the posterior tibial artery—the vessel that carries blood to the bottom of the foot. Tissues in the sole of the foot fed by this artery begin to degenerate as the bloodflow decreases.
Other possible causes of or contributors to this health problem include:
- Reactive arthritis
- Psoriatic arthritis
- Rheumatoid arthritis
- Calf muscle shortening
- Corticosteroid injections
- Plantar fascia contracture
Shoe therapy—finding and wearing men’s and women’s shoes that allow the feet to be in their natural position—is one of the most helpful strategies in treating or preventing plantar fasciosis. Shoes that possess a flat heel, are widest at the ends of the toes, lack toe spring, and have flexible soles are most appropriate for this foot problem. An increasing number of shoe companies are producing shoes with these design characteristics, but shoes that include all these features are still difficult to find. Most conventional footwear can be modified by stretching the shoe’s upper, bending out the toe spring, removing the shoe’s liner, and cutting the shoe at certain key points to allow more room for the foot.
Correct Toes is another powerful foot health tool for addressing plantar fasciosis. Correct Toes addresses the root cause of plantar fasciosis by properly aligning the big toe and reducing the tension created by the abductor hallucis longus on the blood vessels that feed and “cleanse” the tissues of the plantar fascia. The plantar fasciosis-related pain will diminish over time as the dead tissue is washed away.
A rehabilitation program for the foot, which includes targeted stretches and other exercises, may be helpful in treating plantar fasciosis too. Key exercises for this purpose include the Toe Extensor Stretch, the Big Toe Stretch, and the Ball Rolling Exercise. Dietary changes and aerobic exercise are particularly important for overweight individuals who have plantar fasciosis. Water aerobics may be most appropriate for a person whose pain does not allow him or her to walk or cycle. Physical therapy may be another helpful treatment modality for this problem, and includes therapies such as ultrasound, electrical stimulation, contrast baths, and range-of-motion exercises. Massage, acupuncture, reflexology, and magnet therapy are other holistic approaches that may be helpful.