Illusion of Thicker Hair

Is there any hairstyle that can give the illusion of thicker hair? I'd also like to know if there are any styling techniques or products that can help make my hair look fuller without causing additional damage.
A: Given your diagnosis of chronic anemia and stress, I will presume that you are under a doctor's care and that this hair loss will hopefully prove to be temporary. In the interim, you will want to maximize the appearance of your hair until the new growth comes in and you can resume a more normal appearance.
The key with layering is moderation. Too many short layers can actually make fine hair look thinner by removing too much density from the ends. Instead, ask your stylist for long, internal layers that build volume and encourage your natural wave without sacrificing the overall thickness of your hair. Keeping a little extra length around the front can also help soften the appearance of a thinning hairline while framing your face.
Avoid chemical treatments like perms or heavy bleaching, as these can cause severe breakage on hair already weakened by anemia and stress. Instead, you can easily create temporary volume using heatless styling methods, such as sleeping in soft foam rollers. If you prefer using a curling iron, always use a low heat setting and apply a lightweight, alcohol-free heat protectant spray first to safeguard your dry hair from damage.
Your haircut can also make a significant difference. A shoulder-length or slightly shorter style (like a long bob) often gives fine hair more natural body than very long hair, which tends to weigh itself down. A deep side part or a soft, zigzag part rather than a perfectly centered part can also disguise thinning around the front hairline by redirecting the hair to create the appearance of greater fullness.
Since you mentioned that your hair is somewhat dry, it's important to strike a balance between adding volume and maintaining moisture. Use a lightweight, moisturizing conditioner, but concentrate it strictly on the mid-lengths and ends rather than the scalp. This will help prevent the roots from becoming weighed down and flat while still keeping your dry ends healthy and manageable. For styling, look for volumizing mousses or root-lifting sprays labeled "alcohol-free" to prevent further drying.
Finally, because dark brunette hair contrasts highly with a pale scalp, you can use cosmetic illusions to mask the thinning. Consider using hair building fibers (made of natural keratin), a tinted root touch-up spray, or even a matte eyeshadow that matches your brunette shade pressed gently along your front hairline. These cosmetic solutions will instantly make your hair look much denser.
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See also:
Roller styling techniques
Does hair thickening spray really work?