There is a small focused skin thickening on my r index finger (inside of hand). it is painful when pressure is applied, i.e when i grip anything. it does not resemble a wart at all. has become bigger and more painful over the past 10 months?

Finger cyst : It is important for your provider to examine this area. In this area as you could have a cyst along the tendon that attaches to the end of your finger, or another type of cyst or solid fibroma that may need to be removed or biopsied. Your provider may need to refer you to a hand surgeon for an expert opinion especially if surgery is being considered.