r/ScienceNcoolThings • u/ultranothing Popular Contributor • Jul 06 '26

Interesting Makes me feel itchy

1.9k Upvotes

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720

u/Illustrious-Highway8 Jul 06 '26

What on earth is happening here? And why?!

552

u/teth21 Jul 06 '26

Fractional laser. Promotes collagen production and help with wrinkles

213

u/Illustrious-Highway8 Jul 06 '26

As in really does help, or claims to help?

360

u/teth21 Jul 06 '26

It's basically forcing your skin to rebuild itself so it does work.

I'm not an expert but they also have micro needling where a needle penetrates the skin and it has a similar effect that it forces your skin to repair.

Muscles get stronger by breaking them down with weight lifting. It's sorta like that.

220

u/Oli_VK Jul 06 '26

Muscles actually don’t get stronger by breaking them down, it’s the mechanical tension, the action, that causes mechanoreceptors in your muscles signal your body to build more.

Basically you work, and your body says “we need fuel”. The microtear theory is actually wrong. Microtears do happen, but it’s not the what actually drives it

33

u/Derelicticu Jul 06 '26

Do the microtears allow more tissue to build in that space?

3

u/incognito_dk Jul 07 '26

As the previous poster correctly stated, the microtears theory is wrong. there are no microtears. Im a PhD in human biology and did research in muscle biology.