Beardie always has stress lines on beard

Hello! I already posted a thread about this but I didn't give much info or get any replies that helped, so let's try again. As the title says, my beardie, who is now 2 1/2 months old, has always had stress lines on his beard. No matter what he is doing he always has stress lines on his beard. I've had him for one month now and it's always been the same. I just can't seem to figure out why. Here are some pics:


Any advice on what I should do? Thanks!

FAQ:
A: How old is your beardie?
Q: 2 1/2 months
A: What sized tank is he housed in?
Q: 40gal. He seems to be enjoying the extra space and he loves to explore the tank often.
A: What UVB light are you using?
Q: A reptisun 10.0 which is about a foot away from his basking spot.
A: What are you feeding him?
Q: He eats a lot, about 40 small crickets a day and some occasional mustard greens.
A: How long have you had him for?
Q: 1 month

Just looks like natural patterning to me. Nothing wrong that I can see.

Oh, really? I had no idea beardies could even have patterns on their beard. Thanks for your help!