Infant hit his head and has a gooseegg

Gabriella

My 10 month old hit his forehead on a piece of furniture and immediately got a huge gooseegg and it was terrifying! He cried for a bit but seemed fine so I didn’t take him to the hospital. It’s been almost a month and he still has a tiny bump that is still noticeable. Will this be permanent or should I take him to the doctors?