Hello everyone! This is my first time posting here!
I have a 4 year old female IRN, called Raffy. Recently (about 2-3 weeks ago) I noticed that she has an unusual dark spot on her beak. She has always had some dark coloring on her beak, however this one seems unnatural. I have been reading and people say that these spots can be natural changes, or caused by a variety of thing - from an unbalanced diet, through a bruise, to an infection or a disease, so I am worried. Does anyone have any experience with this? Should I take her to an avian vet?
Here is a picture of the left side of the beak, where the spot is:

And the right side for comparison:

She is currently molting, so she is looking a bit rough : (
She is on a mixed seed diet and I try to give her fruits and vegetables daily, though she doesn't always like them. I also give her vitamin supplements. I haven't seen her hit herself anywhere recently, though I'm not always at home.
I hope she is fine! Thank you in advance!