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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Dd is gaining weight rapidly and I don’t know why

305 replies

megabrilliant · 26/02/2026 15:21

I weighed my dd today she is 10 and weighs 7 stone 2 at 4 foot 8 which puts her at 96 centile.
I weighed myself at the same time and I was 7 stone 1 which at 5’2 makes me marginally underweight but only by a couple of lb.
My 8 year old was only 4 stone something and smack bang in the healthy range.
I just don’t understand and I know people must think I feed her junk but I give them both the same breakfast, same packed lunch and cook them the same dinner and so if anything the youngest eats more for her age as she eats the same size meals.
I walk them to and from school each day which is about 15 minutes each way so that’s half an hour exercise and they both do activities out of school plus we go swimming and are quite an active family generally.
No sweet drinks or junk food.

An average day will look like this.

Breakfas
2 pieces of toast and spread or bowl of porridge or very occasionally a croissant or hot cross bun for a change.

Packed lunch
Sandwich or wrap with ham or cheese.
yogurt
piece of fruit
cereal bar for snack at break and water.

Dinner
Meat, all fresh like chicken breast or pork chops, veg, potato or rice or pasta, occasionally beans but rarely.

If they are hungry later they have fruit or cheese or cracker type biscuits but other than that I can’t see how she is ballooning in weight.
I used to give her size 6 clothes I didn’t wear anymore because she fitted in them and now she doesn’t and I’m buying primary school uniform in age 15 online and she’s in teen clothes, I bought a coat in age 15 and she’s struggling to do the zip up.
Her teeth are good, she isn’t a good sleeper but is there anything else I can do for her or is she just a bit bigger but can that still be healthy, I think people think it’s neglect and I’m giving her the wrong food but we all eat the same.

OP posts:
Bridesmaidorexfriend · 26/02/2026 23:42

Love2read12 · 26/02/2026 16:03

Read it all now. Asking if she could be pregnant ffs what a reach. Age 10 you should be disgusted with yourself for suggesting. Let’s go to the most extreme thing and suggest it. Perhaps could she has under active thyroid or hormone condition would be my first thought not child pregnancy. Op honestly ignore all these post. MN proves again sados with nothing better to do

child sexual abuse is a thing, let’s obviously hope that isn’t the case, I’m sure it isn’t, but I don’t know why you’d scoff as if it is that far outside the realm of possibility

SparklyLeader · 26/02/2026 23:58

You are a good mum to catch this early. Make sure her hormones are in balance, a doctor orders a test, and she doesn't have pre-diabetes or oncoming juvenile diabetes, also a test, and allergy testing, as well. Allergies to foods can cause weight gain and so can too much sugar. Children will sneak those treats. Reduce the carbs bit by bit and replace with whole grains. There can be so many reasons. Don't blow off testing. It's better to eliminate issues than it is to ignore them.

Wellwhatnowbellaboo · 27/02/2026 00:01

megabrilliant · 26/02/2026 22:59

What would you suggest for breakfast?

Protein far better ! Scrambled eggs for example, yoghurt with fruit, full fat milk over wheetabix, etc. Toast full of nothing calories. If she likes toast skip to 1 and add peanut butter

LuckyOliveDeer · 27/02/2026 00:11

Too many carbs not enough fruit

Watdidusay · 27/02/2026 00:12

Wellthisisdifficult · 26/02/2026 16:04

This is going to derupt everything you’ve prob always thought about overweight people. She’s prob got some gene from back on her dad’s side that makes her gain weight even though she’s eating the same as underweight people. We’re all different, she’ll prob just naturally be about 50% heavier than you as an adult and still prob be in the healthy range or maybe slightly overweight- it’s likely she’s just genetically programmed to be heavy as very many overweight people are

Nonsense

Om83 · 27/02/2026 00:13

My kids both grew ‘out’ around this age, and then stretched up, maybe nothing but gaining excessive weight without meaning to could be something like a thyroid issue, so best go check it out at the gps.

Marasme · 27/02/2026 00:29

Watdidusay · 27/02/2026 00:12

Nonsense

it s not - the main cause of excess weight is genetic.

between this and the UPF nonsense, this thread has brought plenty of "quality" opinions

unkownone · 27/02/2026 00:36

My youngest got quite pudgy around that age. But i noticed her feet lol like a puppy. Very big feet lol. She was only like that a short while. We never weigh in our house so no idea of her weight..but we just continued eating well and being active. She was very active and now she's tall, lanky and all legs and bones. But again, healthy.

Crushed23 · 27/02/2026 00:58

YankSplaining · 26/02/2026 22:12

“I’m still hungry!”

Be more firm? She’s obese and needs support to get to a healthy weight.

Carla786 · 27/02/2026 01:09

Marasme · 27/02/2026 00:29

it s not - the main cause of excess weight is genetic.

between this and the UPF nonsense, this thread has brought plenty of "quality" opinions

Why is it nonsense to criticise UPF foods? There's strong evidence they are harmful.

TheOchreJoker · 27/02/2026 01:14

You need to keep in mind you're very small for an adult and there's no sense in comparing your size to your 10 year old daughter, from what you say of her and her current shoe size she will likely be a good bit taller than you. I was her weight and shoe size at that age, went through a massive growth spurt and hit 5'8 by 14 and size 8 in shoes.

Of all my siblings only one is close in height to our parents, the rest of us tower over them. Don't assume she takes after your side of the family in stature or build.
She's at the growth spurt age and I wouldn't worry.
Also make sure you don't make a big deal out of this or restrict her food, she is growing and puppyfat is normal in preteens.

YankSplaining · 27/02/2026 01:25

PyongyangKipperbang · 26/02/2026 22:26

I dont know if it helps but I read an article some years ago that said many people, but especially children, struggle to differentiate between thirst and hunger. So I started drinking a glass of water (or offering same to the kids) when the "I'm still hungry" thing happened with the promise of something in half an hour if I/they were still hungry. Was rarely needed but I realised I needed to up our fluid intake, which also helped.

Yeah, we’re working on that one. Thanks. 🙂

Dagda · 27/02/2026 01:47

I wouldn’t be worrying too much. My 13 year old put on a lot of weight at 11 and then suddenly had a growth spurt and was slim but hitting puberty by 12.

I think it is quite common.

WestEaste · 27/02/2026 02:24

I think you have an unhealthy understanding of weight and that she is overweight. It’s not one or the other.

It is not normal for you to be underweight. It’s not normal for her to be overweight either. But because you are underweight, you are not in a healthy position to help her lose weight because your view of normal is skewed and you’re likely going to place unrealistic expectations on her, and pressure her

You haven’t even said whether you are weighing her under optimal conditions ie before eating or drinking anything first thing in the morning, not being fully dressed etc. because if she’s weighing herself after eating breakfast with school uniform on, the scales are obviously going to read as higher. Beyond that as well you need to weigh regularly to know whether it’s trend or a one off. You can’t weigh her once and assume the world is ending when as others have stated it could be her body going though puberty changes etc as opposed to pure fat gain. You’ve weighed her this once, and are already catastrophising. This indicates you aren’t fit for the job to help her with this. Surely a normal parent would note the weight, weigh again in a few days or a week to monitor progress then decide whether to adjust food intake once consistency is confirmed.

SheSaidHummingbird · 27/02/2026 03:45

megabrilliant · 26/02/2026 16:09

Thank you, I hope that’s it and that’s fine, I just thought I’d make sure it was nothing to be concerned about.

@megabrilliant Ignore the previous comment. Ignore any comment from any person who says 'derupt'. There is no 'fat gene'.

SheSaidHummingbird · 27/02/2026 03:47

@megabrilliant If her stomach is distended it could be an intolerance, such as lactose or gluten.

Pearshapedpear · 27/02/2026 05:01

nondrinker1985 · 26/02/2026 15:32

Why you weighing her? Your whole post smacks of disordered eating to me - and that’s you.

This

ImNotReallyHere · 27/02/2026 05:22

My DS was the smallest in class all through primary. Then in y7 suddenly needed short leg extra wide fitting trousers. I was like you surprised how wide he had become. Suddenly growth spurt kicked in and no change of diet but he is tall and slim. I wouldn’t panic yet.

Newbutoldfather · 27/02/2026 05:54

I think any rapid and unexplained weight change merits a visit to the GP.

I wouldn’t just leave it or make assumptions

whereswilson · 27/02/2026 05:55

Maybe she is about to go into puberty and/or have a growth spurt.

lindabysteven · 27/02/2026 05:56

Sorry I haven't read the whole thread, but my son gained a lot of weight at about the same age, after previously being super thin (scarily so his whole life previously). he then just got super tall and everything sort of evened itself out after that. I would definitely speak to your GP if you're worried but sounds to me like a very normal part of your daughter's puberty.

FranMais · 27/02/2026 06:10

I am confused, are girls now fully developed and grown by around 11/12?

DD1 is 13 and still hasn't shot up or got her period. When is this big, fast growth spurt happening for all your girls?

Spiffingdarling88 · 27/02/2026 06:47

Psychosislotus · 26/02/2026 20:55

Yes that’s really low.

I am a size 8/10 on top - I like an oversize look. Flat stomach. Size 00 in jeans. And I just weighed myself last week for ski bindings and was shocked to know I am ten stone 5 (in clothes and trainers). That’s crazy. I thought I was 9ish.

I was once really mentally ill and dropped to 7’5. Honestly I was like skin and bones. I still am half skin and bones tbh if I look at things like my wrists, ankles, ribs. So no idea how a grown woman is sustaining 7 stone in a healthy manner.

I don't know how a 10 stone woman can fit into size 00 jeans but there we are.

The amount of rudeness about ops weight is shocking. She obviously mentioned her weight to show she isn't overweight, otherwise she will have endless replies about portion size/calories.

LBFseBrom · 27/02/2026 06:58

I looked it up and she is "slightly above the average weight for this height".
That doesn't sound like a problem, she is still growing and will no doubt shoot up before long. Keep a eye on it but as long as she eats healthily and has exercise, I'm sure she'll be fine.

I can remember being a bit podgy as a child; aged ten, I was 4'10". I slimmed down later as I grew taller. Nobody seemed bothered by it, I certainly wasn't obese. Neither was I alone, plenty of others were the same at that age (and some of course were always skinny regardless of what they ate, that is life :-)).

Bingingagain100 · 27/02/2026 07:03

For context. My daughter is 4’8” and has just reached over 8 stone. She’s just turned 11. I know all my family got chubby just before periods started then slimmed back down so I am not worried in the slightest. My daughter doesn’t move much though so I am careful with her diet and do my best to encourage her to walk/attend sports groups. It’s all I can do for her while we wait for her to take her first period and take that final growth spurt.