Soft spot more firm than normal

Mikayla • Vegan momma to baby Asher👶🏻💚

Why is this?

*note i don't touch it ever but i have before and it was so soft. I had my hand on his head lightly because i could feel his heartbeat on it and it was very firm. Should I be worried of random brain swelling? He's only 6 weeks old

Edit* I do NOT touch the soft spot. I just had my hand on his head and could feel it