"Hair Ye, Hair Ye"

As a hairstylist, I can say yes, the keratin treatments and flat iron can cause all that damage since that hair is still on your head. Pregnancy will change your hair, and it will usually stay changed.

Since I don't know what your hair looks like, or the length or anything, it is hard to say exactly what to do. But getting a good shorter cut, with some graduation will add body. (Layers will actually thin your hair more). Getting conditioning treatments and regular trims are an excellent idea. I love Sebastion's Potion No 9 for a mousturizer creame. Just be very light heanded with it, becaue it can weigh hair down as well. I would also get a glaze done, a Sebastion/Wella salon would be able to do one called a ColourShine that is very healthy for your hair, adds moisture and shine. They typically last 4-6 weeks, longer if you take cooler showers as hot water washes them out quicker. There are a lot of conditioning treatments you can do at home as well. For added body, Sebastian has an excellent (though expensive) product line called Body Double that adds tons of volume to thin, limp hair.

Also, do not brush your hair when wet (use a wide tooth comb or pick), allow it to air dry at least 75% before blow drying, always use a heat protectant spray such as Paul Mitchell's Seal and Shine before using a flat/curling iron and use small sections at a time. Don't use tight rubberbands or buns/ponytails with wet hair, as that contributes to breakage.

Thyroid and other medical issues can cause similar problems, so can well water. But since you just had bloodwork done, I guess you can rule that out.

Also, work with your natural texture, not against it.

Are you using birth control? If you are using one with hormones it is messing up your hair. I lost my natural springy curls after I put in the Mirena - 5yrs later took it out and they are BACK!

Also for curly hair I suggest you try the Hair One (Sally's,), or Wen system - no sulfates Lush has one out too have not tried it. No more towel drying your hair if it needs it use paper towels and squeeze do not rough up (goes for all hair types). I have found that the Tresemme curling mousse works well along with the frizz tamer and gel (all from the bouncy curls line) along with a diffuser attachment on your hair dryer (or air dry) make sure you gently apply product with your head upside down and focus on the ends and mid shaft of hair - not too much on your roots. Handle your curls as little as possible and twist them on your finger as you apply the product (to shape). You should also gather the hair in the diffuser then turn it on, turn it off to release hair and repeat. When you gather your hair into the diffuser with the hair dryer on you are asking for frizz. Make sure that when you use hair products you allow them to be in your hair for about 10 min before styling - they do not tell you this but it really helps. Please use heat protectant each time you style with heat (Got2b has one for flat irons and hair dryers) and once every two weeks use a clarifying shampoo (neutrogena two drops will do) to get out all the products. Do not wash your hair daily curly texture needs the oils to build up. I will wash my hair Monday then Tuesday spray it with a spray bottle add some mousse and use dryer then Wed do the same but wash it Wed night (add style products and let air dry) - Thurs wet again and dryer - Friday wet again and dryer - Wash Sat am - Wet Sun and wash Mon (am) and do it all over again.
NEVER USE A HAIR BRUSH ON CURLY HAIR UNLESS YOU ARE DOING A BLOW OUT! That is what hair pics are for.
http://www.bigdaddybeauty.com/p-4679-cricket-friction-fre...#

Whoops. Hate to contradict Momma L... but DO brush your hair when wet if you have CURLY hair. Don't ever, ever, ever EVER brush it dry. Unless you're going for the Wild Woman of Borneo look (I do that once in a blue moon) and want a LOT of breakage. Straight hair breaks when wet, curly hair is a different structure and is a gazillion times stronger when wet than straight hair, but will break like nobody's business when dry. Plus there's the frizz factor. Both the hair shape is different, and the hydrogen bonds that hold the protein chains to shape. Water (and heavy metals, some chemicals, and radiation) denature those hydrogen bonds. Straight hair becomes very weak, chemically speaking, when wet, curly hair become weak when dry.

1) If you're brushing your curls dry... there's no way to avoid frizz. A teeny tiny population of curly haired people have 'baby curls' into adulthood, which makes shiny no-frizz curls that you can brush dry. The rest of us... Just call us Simba if we tried!

2) What kind of product are you using in your hair? My product needs change with weather and hormonal shifts... I've used a LOT over many different moves, and several pregnancies. The amount of product never changes (for my ringlettes I need a grapefruit sized ball of mousse, or a full palm of killer gel -about 1/4 cup- for shoulderlength hair), but the type changes a LOT depending on the weather and what my hormones are up to.

try hair cholesterol 1-2 times a week. leave it on your hair for like 5 mins. use a handful and work it through your hair

I have my own issues with hair at my house (from daughters with un-ruly curls that turn into knots to stick straight frizzy). I saw this product on Pinterest one day and saw how many people commented on it. So, while I was at Target one day, I snagged a bottle. Not only does it make the curly knots go away, it also tames frizzies like a beast! Try this http://www.amazon.com/Its-10-Miracle-Product-4-Ounces/dp/...

Instead of brushing it use a pick. use mouse or gel and put it in while its wet