I ve been experiencing tingling and numbness mainly in my middle finger of my right hand and occasionally my index finger. I was diagnosed with breast cancer 7mths ago and had a lumpectomy on the right breast, however the numbness and tingling has only started in the last month or so and becoming more frequent. Could this be a nerve issue from the surgery on my breast. I have no pain in my arm or wrist. I experience this more at night.