I have small painless lumps in my fingers,one on the right hand and one on the left hand?

i have a small painless lumps in my fingers 1in the right hand and the other on the left hand ,they have been there for the last 1 year,i trim them with a razor blade but after sometime they reappear,but have not spread ,i used to work in a hospital , i asked, one of dermatologist told me it is gloves ,for the last two months am not working in a hospital,but they are still there,am afraid thy might be something serious,any one who has a clue,just help