The Effects of Transcutaneous Electrical Nerve Stimulation on People With Knee Osteoarthritis (OA) and or Chronic Pain

Inclusion Criteria: * Male or Female between the ages of 45 years or older * Ultrasonography scale of 0-3 for grading of primary Knee OA of the knee(s) * Pain perceived as a minimum of 3/10 on a 0-10 pain scale with 24 hours of the each visit * No phobia of electrical stimulation * No pain or anti-inflammatory medication will be taken during study * OA and or Chronic knee pain, Injury/pain that began minimum of 6- weeks before the beginning of the study. Exclusion Criteria: * Pregnancy * Diabetes Mellitus * Neuropathy * Smoker * Uncontrolled HTN * Past surgery in the region to be treated by TENS or had received an intra-articular corticosteroid or hyaluronic acid injection within 6 months prior to enrollment * Arthritis (RA) in the area to be treated by TENS * Allergic to tape/electrodes * Dementia * History of knee joint replacement or tibial osteotomy * Undergoing physical therapy * Any major joint pain (e.g., back, hip, or ankle) that could limit functional ability * Contraindications to TENS (pacemakers, dermatological conditions, and abnormal sensation in the knees) * Severe medical or neurological conditions (e.g. Chronic obstructive pulmonary disease, cardiovascular disease, arteriosclerosis obliterans, cerebrovascular accident, lumber disc, herniation, and rheumatoid arthritis) * The subject does not utilize stairs in daily living * The subject is unable to walk without ambulatory assistive devices.