Hi, I ve had pain off and on in my right hand in the bottom right side of the palm for years (currently as I ask this question is bothering me). It s painful to touch, tap or pick things up sometimes when the symptom occurs. You can even see swelling on the inside of my hand on the bottom right side, under the thumb. Could this be arthritis? It s been off and on for years. I was told it was tennis elbow, but the more I look into it, it doesn t match my symptoms. Thanks