Say Goodbye to Knee Pain With Knee Gel Injections Gel Injections for Knees: A Comprehensive Guide Dr. Hart, MD. Viscosupplementation Saguaro Pain Clinic A gel injection for the knee helps improve joint lubrication when natural synovial fluid becomes thinner or less effective, which often happens with arthritis., This gel acts as a cushion and Can you avoid knee surgery with viscosupplementation? Peak Health and Wellness