What can I do while we stay at home to thicken my baby fine hair? Until a few years ago I had lots of fine hair and during a stressful time lost a few patches and all of my volume. Since then my hair has grown back but it’s baby fine and won’t grown past my chin. I’ve got around this with extensions with a really trusted hairdresser. I’ve just had the extensions out and my hair is so fine. Is there anything I can do to nourish or thicken it at home in the mean time. Been looking at castor oil and regain.