Left Pinky Finger Swelling.

I have never had this before but I have swelling in my fretting hand in my little finger. I have not seen a doctor yet but have been doing some research on this and I can't tell if it is tendonitis or not. Maybe it is just muscle fatigue. I stopped playing for a couple of days and it went away but then I tried yesterday and after a three hour session it was back. I need some advice about how long to practice and take breaks or just in general. Any advice would be greatly appreciated.

Hello New To Gmc

Hello all,

My name is Mike I live on an Island in the Torres Strait North of Queensland Australia called Thursday Island. I have been playing guitar for 36 years. I have recently dedicated myself back to the instrument after a 1.5 year hiatus. I originally lived in Chicago IL, in the U.S. and played in bands and wrote a lot of original material. I still write material however I can't sight read or basically read notes at all. However i am not here for that. I am here to increase my knowledge of playing and continue to grow on the instrument. I am also here to improve my right hand technique, yes I want to able to shred.
I also want to improve my chord knowledge and theory as well. I played a lot of hard rock and metal even experimented with some avant garde Jazzier things. Anyways I am rambling, I am pleased to be here let the learning begin.

Peace Mike