Thanks for the replies. Your responses are very helpful -- things I'd not thought to ask.
I'm mildly concerned about the fact that there are three of them, which may indicate internal ones as well. I do want to bring that up during the consult. I do expect the doctor to look at all of them since each of them is slightly different. One is solid and medium-sized, another patchy and medium-sized, the third is solid and small.
Also, I'm posting a picture of the H in question.