Thanks for posting your query.
I will be glad to be of assistance.
I can understand your concern.
There is a possibility that it could be seborrheic keratosis
This is a benign growth that is dead skin and can occur as an aging change.
But it would be best to visit your dermatologist
who can examine it and rule out any malignancy if present.
He would be able to do a dermatoscopy which will allow him to see the freckle
That will enable him to confirm the diagnosis and treat it appropriately.
Please let me know of you have any additional concerns.