Suggest Treatment For Itchy Moles

My husband has two large moles that concern me quite a bit. One on his lower back and one on his left shoulder. They are both pretty much the same size, about as big as a tiny pea. They both seem to have almost doubled in size over the last 6 or so years and he is always scratching at them, saying that they itch,which has caused both of them to have tiny scab on each from scratching too hard I imagine. They're both brown and round shaped, no odd colors or shape but I cant help but feel concerned that they are twice as big and itching. It's impossible to get him to go to the doctors office for anything, so my question is; Are my concerns valid or is this seem normal? This has really been bothering me alot lately, I appreciate your time , thank you,