To compare the effects of the following types of therapy on knee range of motion when given to patients with chronic knee pain:
* A standard steroid injection * Peripheral nerve stimulation (PNS) therapy in combination with a standard steroid injection * PNS therapy in combination with a placebo injection
Steroid injections are given directly into the knee joints and are considered to be the standard therapy for chronic knee pain. In this study, the injection will be made of the steroid drugs triamcinolone and bupivacaine.
Patients diagnosed with chronic knee pain (baseline pain score >=4), seen at Pain Management Center at MD Anderson Cancer Center; if patient has bilateral knee pain, the side with the more severe knee pain will be treated first and counted towards the primary and secondary endpoints
Patients between ages 18-85 years old
Patient signed informed consent
Patients with cognitive dysfunction or without capacity to consent
Patient with recent history (<6 months) of drug or alcohol abuse
Patients with open skin lesion or undergoing antibiotic therapy for local for systemic infection
Patients with allergies to local anesthesia, steroids, or adhesives