Chronic patellar tendinitis is characterized by structural changes such as collagen fiber degeneration, neurovascular infiltration, and calcification within the tendon, rather than acute inflammation. At this stage, stimulating tissue regeneration is key, rather than simple anti-inflammatory treatment. Needle acupuncture induces the secretion of growth factors such as TGF-β and IGF-1 through mechanical stimulation, while thread embedding utilizes bioabsorbable threads to provide continuous tissue stimulation over several weeks. The efficacy of combined needle acupuncture and thread lifting treatment is also being reported in comparative studies with PRP and extracorporeal shockwave therapy. Korean Medicine Clinic Perspective Prolonged illness inevitably accompanies the depletion of the body's fundamental energy. When vital essence (Jeong-hyeol) becomes deficient, sufficient nutrients do not reach tendons and bones, leading to a decline in regenerative capacity. At Dongjedang, we use needle acupuncture and thread lifting to release stagnant blood and adhered tissues within the tendons, creating a local environment for regeneration. Additionally, tailored herbal medicine supplements fundamental functions to enhance overall body recovery. For chronic tendinitis, a comprehensive treatment plan that combines internal and external treatments is necessary.