There's a bump under my left foot around the arch area. it's painful and a bit hard. it's not visible but i can feel it with my hands.?

plantar fibroma: You will need to be seen by a podiatrist for exam and x-ray evaluation for heel spur syndrome. You have a thick plantar fascia known of plantar fascitis. There are multiple treatment and the podiatrist will help you with the treatment that will hepl you the best.

You need to have it : Checked out, it may be a plantar fibroma or a ganglion. A podiatrist would be able to help you.