My 16yo DD is breastbinding. WWYD?

[Kitfish]

I've just discovered that my 16yo DD, who identifies as gender fluid, has started buying breastbinders and is breastbinding. I am worried about this as, looking at the information I can find online, breast binding sounds like something that could cause a lot of damage to her developing body and cause long-term pain/injury.

I'm not sure about the best aproach to discuss my concerns with her. I want to be understanding without being encouraging but - if I'm honest - I want to dissuade her from doing something that could cause her pain and damage.

Please can you wise Mumsnetters give me some advice as to how best to approach this.

I was thinking about this the other day and I decided that I would not do anything in the short term, because the breast binding would likely be uncomfortable and a pain and I would hope that the teen would decide for themselves based on this that it was not sustainable and what to do about it. If it then continued, I think I would say I'd noticed and ask about their experience of and knowledge of the practice - what they had read, what they felt. Then I would focus on taking good care of themselves, looking after their health and making positive decisions about what is right for them. I would share information about future harms and risks in a factual way. I would perhaps try to have a contextual conversation about other forms of constraint on the female shape such as foot binding or corsets. But overall, with teens, I wouldn't go in hard and reinforce it, I would be considered and nuanced in my approach to the conversation and I would listen and ask questions.

Thanks @GoWalkabout for your advice. Much appreciated.

Anyone else?

My 15yo has just started talking about this. I don't think in her case it's about being trans or even non binary, I think she hates her chest and wants to be androgynous.

Sorry I'm not being helpful but I suppose I'm trying to work out whether I think it's ok for her to do it.

What does your DD say about it?