"Growth" on back foot

I noticed a few weeks ago, Milo had a thing on his back foot. I thought it may be an abscess or just nothing...possibly like a skin tag on humans? I was finally able to get some pictures when I clipped his nails earlier this week. It hasn't grown any and isn't bothering him, activity and food intake are the same as usual.

Do you think I should have it checked out?

*Milo previously had an abscess under his chin.