I am feeling a sharp piercing pain between my middle finger and ring finger on my left hand. The pain is only when something touches that area.?

In this area there . Are nerves, blood vessels and fascial structures, a ganglion or cyst or a trigger finger can also seem to hurt there. Gout or tenosynovitis can hurt ther too...A thrombosed vein or a bruised nerve or a glomus tumor can affect this area too as well as a foreign body or sliver..... Most important tho there is an infection that can develop somewhat hidden in this area, .
See your doctor. These symptoms can only be adequately addressed by your doctor in real-time (face-to-face). Only after a thorogh evaluation, possibly including labs and other studies, can he/she determine what's wrong and what to do about it.