Should I be worried about lumps on neck? Photo

[starrewonder]

Son has lump on the back of his neck. Has had for a long time but recently getting bigger?

This is the NHS advice page, I would see the GP based on this.
https://www.nhs.uk/conditions/lumps/

If you’ve not already seen a GP then yes absolutly I would see a GP, contact them first thing tomorrow. It doesn’t look like swollen glands so random lumps always need investigating, and if you’ve already seen the GP you need to go back as they’ve changed.

I will definitely call the GP tomorrow.

I’ve got lumps on the back of my neck I went for a scan and they said it’s fat lumps

As others have said, I’d get the GP to have a look. Looks like possibly some sort of cyst/fatty lump