Study of Low Level Laser Therapy to Treat Chronic Heel Pain Arising From Plantar Fasciitis

Inclusion Criteria: * Unilateral mechanical plantar heel pain * Chronic heel pain defined as at least 3 months of ongoing heel pain with no evidence of acute trauma to the heel * Degree of heel pain rating on the 0-100 Visual Analog Scale (VAS) is at least 50 for heel pain experienced upon taking the first few steps of the day. * Heel pain has been previously unresponsive to prescription non-steroidal anti-inflammatory drugs (NSAIDs) taken over a minimum period of 2 weeks; and any two or more of the following conservative treatments: rest, taping, stretching, orthotics, shoe modifications, night splinting, casting, physical therapy, or local corticosteroid injections * Subject is willing and able to refrain from consuming non-study approved medications or partaking in other therapies for relief of heel pain throughout study participation Exclusion Criteria: * Inability to definitively rule out any one or more of the following potential etiologies of chronic heel pain: mechanical posterior; neurologic; arthritic; and traumatic heel pain * Bilateral heel pain * Evidence of acute trauma to the heel * Loss of plantar foot sensation * Foot deformity * Previous surgery to the heel * Foot trauma within the previous three months * Skin ulceration (infection or wound) on the heel and surrounding area * Sciatica * Benign and malignant tumors * Acute infection of soft tissue or bone such as osteomyelitis * Diabetic neuropathic pain * Type I Diabetes * Sensory neuropathy * Previous diagnosis of neuropathy affecting lower extremities * Peripheral vascular disease or autoimmune disease * Fibromyalgia * Chronic fatigue syndrome * Chronic pain disorders * Metabolic disorders: Osteomalacia, Paget's disease, Sickle cell disease. * Blood coagulation disorders * Significant heart conditions including coronary heart failure (CHF) and implantable heart devices * Non-ambulatory status * Unable or unwilling to consume the study rescue medication of Tylenol * Photosensitivity disorder * Pregnant or lactating * Serious mental health illness such as dementia or schizophrenia; psychiatric hospitalization in past two years. * Developmental disability or cognitive impairment that would preclude adequate comprehension of the consent form or the ability to record the study measures * Involvement in litigation or a worker's compensation claim or receiving disability benefits related to the heel pain * Participation in other research in the past 30 days