Dr. Cara McDonald

So if people are wanting a good place to start, generally it's when you start to see some sort of a line still there at rest, not when you're just moving.

Any lines at rest?

Probably you're never going to have lines at rest if you started at 21.

And that's fine.

But you need to just be careful that you're not ending up sort of overdoing it.

And there is some concern about also a bit like if you don't go to the gym and you don't use that muscle for a long, long time, it atrophies.

So it shrinks down and people might think that's great.

And it does mean that you don't get those lines and movement back even when your tox wears off.

But what can happen is that the skin starts to get that thin look.

Because if you think about your forehead, you've got bone, muscle, skin, and the whole lot is only a few millimeters thick.

And the muscle actually contributes to the thickness of the skin and therefore how the light reflex comes off the skin.

And so when you get those people that have had TOCs for many, many years and you see their skin, it looks older.

It looks shiny.

It looks like a vein.

Yeah.

I've got that vein.

No, no, no, you don't.

But is that vein just because the blood supply is trying to get through your forehead?

And look, you know, we've all got a big vein there, actually.

And if you've got very thin skin, older people, you will see it.