How to make hair thick again after aggressive thinning

[User181019]

DD used to have lovely, long thick hair. Last summer, she had it cut short so she could donate it to the Princess Trust. However, the hair dresser aggressively thinned her hair even though I asked her not to. I did say I didn't want it thinned but she did it anyway. Suffice to say we won't be going back there again. It's been a year now and DD's hair is still looking very lank and lifeless. It's also very thin. We used to struggle to tie a hair band around her pony tail as her hair was thick. It makes me so sad. What's the best way to get the thickness back? I'm worried the aggressive thinning may have damaged her hair. I really thought a year on we'd be back to her thick hair of before. I've been regularly giving the ends of her hair regular trims to get rid of the wispy bits. We've also been using lavender oil massaged into her scalp to encourage hair growth. Is there anything else we can do? Thank you..

There's no way the 'aggressive thinning' has an impact to her hair thickness one year later. This is related to something else. My dd's hair has half the thickness she used to have (she's 17), but she has an eating disorder and is a bit anaemic so I'm sure that's the reason. Maybe worth taking your dd for some routine blood tests (not implying anything related to an ED btw, just some potential deficiency for whatever reason)

At her age I would be considering anaemia or thyroid problems for thinning hair, I’d take her to the GP.

I assume the thinning referred to here is the cutting away of the hair itself as a thinning process as opposed to less hair growing out of her scalp or the hair bring a thinner variety than before.

As such, no oils will fix that - the hair was literally cut off. Cutting above the thinning to the natural hair will mean the hair feels thicker as there's no thinned out section a left, but loses the length.

If the OP actually means the hair is lank and thin where its growing out the scalp, I'd still lose the oils as they will make it feel thinner where its slick and it will just look greasy unless stripped out with fairly harsh shampoos.

Were you there when the hairdresser cut your DD's hair? When you say she 'aggressively thinned' it, what exactly did she do? Used a thinning shears/scissors, presumably, but I assume for texture/ shaping the shorter cut/removing weight?

Time by the sounds of it, so the thinned part gradually grows out and regular trims .