Your doctor may order an X-ray to rule out a stress fracture of the heel bone and to see if a is present that is large enough to cause problems. Other helpful imaging studies include bone scans, MRI, and ultrasound. Ultrasonographic exam may be favored as it is quick, less expensive, and does not expose you to radiation.
Laboratory investigation may be necessary in some cases to rule out a systemic illness causing the heel pain, such as rheumatoid arthritis, Reiter's syndrome, or ankylosing spondylitis. These are diseases that affect the entire body but may show up at first as pain in the heel.
A cortisone injection into the area of the fascia may be used but has not been proven effective. Studies show better results when ultrasound is used to improve the accuracy of needle placement. Cortisone should be used sparingly since it may cause rupture of the plantar fascia and fat pad degeneration and atrophy, making the problem worse.
Botulinum toxin A, otherwise known as BOTOX, has been used to treat plantar fasciitis. The chemical is injected into the area and causes paralysis of the muscles. BOTOX has direct analgesic (pain relieving) and antiinflammatory effects. In studies so far, there haven’t been any side effects of this treatment.
Shock wave therapy is a newer form of nonsurgical treatment. It uses a machine to generate shock wave pulses to the sore area. Patients generally receive the treatment once each week for up to three weeks. It is not known exactly why it works for plantar fasciitis. It's possible that the shock waves disrupt the plantar fascial tissue enough to start a healing response. The resulting release of local growth factors and stem cells causes an increase in blood flow to the area. Recent studies indicate that this form of treatment can help ease pain, while improving range of motion and function.
Clinical trials are underway investigating the use of radiofrequency to treat plantar fasciitis. It is a simple, noninvasive form of treatment. It allows for rapid recovery and pain relief within seven to 10 days. The radio waves promote angiogenesis (formation of new blood vessels) in the area. Once again, increasing blood flow to the damaged tissue encourages a healing response.
Antiinflammatory medications are sometimes used to decrease the inflammation in the fascia and reduce your pain. Studies show that just as many people get better with antiinflammatories as those who don't have any improvement. Since these medications are rarely used alone, it's difficult to judge their true effectiveness.