Does A Swollen And Painful Knuckle Need Medical Attention?

After using garden tools outside, I saw that my knuckle on my middle finger of my right hand was swollen, and that knuckle also
had a dent in the middle of the knuckle. It is very painful to now even bend that finger. Should I go to the Immediate care center or is there a home treatment that I could do? I am female, 60 years old, 5ft 5inches tall, and I weigh 154 pounds. I have pretty good health.