Factors for chronic pain after total knee arthroplasty (TKA) include surgical complications, implant-related issues, soft tissue problems, pre-existing conditions, psychosocial factors, peripheral neuropathy (like diabetes), and central sensitization. While hypertension isn't a direct risk factor, diabetes can increase the risk. Treatment involves physical therapy, medication, injections, lifestyle changes, psychological support, revision surgery if necessary, and complementary therapies like acupuncture or massage.