Meet the Other Phone. Only the apps you allow.

Meet the Other Phone.
Only the apps you allow.

Buy now

Please or to access all these features

Teenagers

Parenting teenagers has its ups and downs. Get advice from Mumsnetters here.

Help with extremely defiant DD (possibly ADHD)

7 replies

worriedpoppet · 14/02/2026 12:24

Long time lurker but first time posting - have name changed for this.

I just wondered if anyone had any experience of this and any advice as we are struggling with our extremely defiant 14 year old DD.

She is defiant about everything. She only does what she wants to do and is quite manipulative to make sure she gets around any rules/requests and gets her own way.

She refuses to comply with the most basic of things, such as taking vitamins (her diet is terrible), won’t take her PE kit and other equipment to school (will borrow from friends but gets into trouble regularly for having things missing), regularly breaks school and home rules and is often in detention for these things at school.

We suspect she might have ADHD and we are part way through the process of private assessment. We were turned away from CAMHS last year for assessment due to the school’s response not being adequate.

There are a lot of other things going on, she’s also very impulsive, steals from me, argumentative, seems to enjoy annoying people, selfish, rude and disrespectful, has food issues, is often late for classes, struggles to wake up in the mornings, is horrible to her younger sister, and is generally quite chaotic. She struggles with focus and organising herself. She doesn’t seem to care about anything. We have repeatedly found vapes in the house, and recently her and a friend were caught shoplifting from the local shop. At the same time, she is really bright, creative, funny/witty, sociable (with her friendship group - no wider), and can be lovely when she wants to be.

Home life is often a battle ground because of all this. Me and her dad are mentally drained and miserable. We spend so much time dealing with all of her negative behaviour that it’s impossible to give the same level of attention to our younger child, not to mention our relationship which has taken a back seat for many years.

We use consequences at home which usually include removing access to her phone or being grounded as they are the only 2 things she cares about. We also use rewards and find this slightly better in terms of making a difference but not much.
We try to ensure consequences are proportionate and try to balance this with being supportive. Essentially we think life is going to be hard enough for her and want to be her safe place.

What else can we do to help?
I’m particularly interested in hearing what others have done in similar situations which has helped their child/family. Any advice on what we should or shouldn’t be doing?

Additionally, are there any services that can help us? I’m not sure where to start with this, but would a therapist or child psychologist be helpful for her? I just feel that we are not equipped to know how to deal with all of this and maybe we could benefit from some outside/expert help.

OP posts:
Aabbcc1235 · 14/02/2026 12:32

I have a younger child with adhd.

In your position I’d start with a blood test to check if there are any deficiencies. As a minimum check magnesium, zinc, iron, lithium. B12 if she doesn’t eat meat. Make a deal with her that if it comes back normal across all areas that you will shut up about vitamins, that if it comes back deficient that she’ll take them with no fuss.

I think that her behaviour about the pe kit is telling you that she can’t manage this. Id pack it for her each day she needs it and put it in her bag without argument or discussion.

If she doesn’t already do any sport, I’d work very hard to encourage/bribe/insist on some sort of movement every day before school, plus exercise sessions three times a week.

But, probably the most helpful thing that you can do for her is get a diagnosis and try meds.

butterflyfox · 14/02/2026 12:49

another lurker here but wanted to show solidarity. My daughter is now 13. I did push for an adhd diagnosis and got one but in our case it did not really make any difference as meds did not work for us. Two things really help which I wanted to share in case it is helpful for you Consequences were pointless at least for us as she could not, in the moment, make the connection between the bad action and losing her phone a day later. At least not enough to stop her doing the bad action I spoke to an expert who recommended setting her up for success and catching her doing the right thing a lot. In this case it would mean packing her pe kit for her or whatever. Really put scaffolding around her so it’s easier for her to be successful. Planning an activity you know she will enjoy and then praising her for being lovely during it. Sounds counter intuitive if you are brought up thinking children “should” behave etc. but breaking the cycle of her always being bad you always telling her off it really nice for us at least. And starts making positive connections in her brain too Good luck.

Hye000 · 14/02/2026 16:41

Not much suggestion with regards to the behaviour but can recommend EllaOla unflavoured vitamin, it’s a powder. I put it into my daughters squash each day & gives her the supplements she needs without the argument of getting her to take it as she doesn’t know it’s in there!

LaurieFairyCake · 14/02/2026 16:48

Look it screams ADHD so you might as well read some ‘how to parent a kid with adhd’ books and do all that.

She literally can’t help most of what you’re describing so you need to get her tested and possibly medicated asap.

So sorry you’re going through this, it’s very hard Flowers

Just act as if she has it and do that.

UnbeatenMum · 14/02/2026 16:54

I have 15 and 16yo DDs with Autism and ADHD. I do a lot for them because of organisation issues. So with the PE kit I would get it together and put it out for her. I usually wake them both up in the mornings and make their breakfasts. I put all their events in my calendar. I used to support with homework too but don't need to any more. They aren't defiant or disrespectful or doing anything criminal though. Just disorganised and forgetful. We have had the same issue with food and vitamins with DD2 but it's sensory related, not intentionally disobeying me so we just keep trying to find something she can manage. DD1 used to like annoying us as a much younger child but has grown out of that.
I don't think it would hurt to see a psychiatrist and see what they think. There definitely sounds like there could be ADHD there, but maybe something else as well. Have you looked into PDA at all?

drspouse · 14/02/2026 16:54

Solidarity here - your DD sounds like the worst sides of my two DC together. Medication has helped DS and we are waiting for diagnosis with DD.
I highly recommend ADHD Dude, silly name but great parenting advice. Start with YouTube and his podcast.

worriedpoppet · 15/02/2026 09:42

Thanks for replies and advice. We will definitely try for the blood test and advice around PE kit etc. We will press on with getting diagnosis and continue to follow advice online, I’ll look up ADHD Dude, I don’t think I’ve seen that one. Thanks 🙏

@UnbeatenMum I have looked up PDA and also ODD and I definitely think there’s something there. I will mention all this in the assessment.

OP posts:
New posts on this thread. Refresh page
Swipe left for the next trending thread