Fluid injection to help lubricate your knee, to prevent knee pain and osteoarthritis NAKORNTHON HOSPITAL 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 lubricant 13 Types of Gel Injections for Knees Compared Joint Relief Institute Best Food For Knee Pain Relief Effective Knee Pain Remedies You Can Do at Home Viscosupplementation for the Treatment of Knee Arthritis