Suggest Treatment For Pain And Swelling On The Knees

I m 61, 5 6 tall, male, 194lbs.,...what do these symptoms suggest....painful swollen knees and legs, discomfort in lower back, painful thighs when walking for a little bit, legs quickly tired, high heart rate of 86 to 105, often cold legs and feet, blood pressure normal to the upper range of normal, sometimes chills even though the temperature justifies use of the air conditioner for normal comfort, sometimes sinus headaches. This is confusing and annoying as I ve been generally healthy most of my life.