Can hair fluctuate in thickness?

Author: Rebecca Wyman  |  Last update: Sunday, August 10, 2025

The individual strands of hair on your head are not all the same diameter (width). That thickness can change over time, declining with age. That means that thick, coarse hair may become thin and finer with age. Having a reduced diameter also leaves hair weaker and more susceptible to damage.

Is it normal for hair to vary in thickness?

  • The majority of your hair strands should be a similar thickness, but it is common for thickness to vary in different areas.
  • Also those with pattern baldness find certain areas where their hair is thinner than the rest.
  • There is no fixed rule and thickness can vary all over your head.

Can hair get thinner and then thicker?

The individual thickness and density of hair is largely genetic and cannot be changed.

Why does my hair feel thinner some days?

Stress and Hormones: Stress can trigger hair shedding, often resulting in thinner hairs being lost. Hormonal changes, such as those during pregnancy or menopause, can also impact hair thickness and shedding patterns.

Can hair thickness be changed?

While you can't actually change the size of individual hair follicles, it is possible to make your hair appear thicker. In some cases, you can even encourage hair regrowth.

Thinning Hair? 4 Hormone Deficiencies

Can hair thickness fluctuate?

In addition to the gradual thinning of your hair, the diameter of its strands also fluctuates. On average, individual hair diameter increases through the early 40s, then begins to decrease around age 45.

Why is my hair suddenly thicker?

Factors Influencing Hair Thickness. Genetics of hair thickness: Genetics plays a huge role in our hair thickness. Our hair is preprogrammed at conception but can be influenced during our lives by our health, the medications we take, lifestyle factors like diet and stress, and natural changes due to ageing.

Why is my hair getting thinner all of a sudden?

"Sudden thinning hair can be a symptom of anemia (low red blood cell count), hormonal issues especially related to events like pregnancy, or a thyroid disorder, which are all very common in women," says Dr. Peredo. If any of these are the case, hair loss won't be the only symptom present.

Why is my hair density decreasing day by day?

There are various causes of low hair density. While in some cases, it is due to poor quality hair products, some have naturally thin hair due to their genes. However, inconsistent hair care routines and excessive exposure to UV rays and chemical-ridden products have a major role to play in declining hair density.

Does biotin thicken hair?

Conclusions. Despite its popularity in the media and amongst consumers, biotin has no proven efficacy in hair and nail growth of healthy individuals.

How to get hair back to original thickness?

How can I get thicker hair naturally? To naturally thicken hair, focus on a balanced diet rich in protein, vitamins (especially biotin and vitamin E), and minerals like iron and zinc. Regular scalp massages and nourishing treatments, such as Living Proof's Scalp Care density serum, can also promote hair growth.

Why am I getting random thick hairs?

A Quick Review. Having one particularly dark, coarse hair on your body is not unusual. These hairs typically pop up due to hormonal changes, in response to pregnancy or menopause, or if you are genetically predisposed to having slightly higher androgen levels than average. If you choose, safe ways to remove hair exist.

What is the best hair thickening shampoo?

Our Top Picks: Best Overall: Kérastase Densifique Bodifying Shampoo, $44. Best for Color-Treated Hair: Pureology Pure Volume Shampoo, $37. Best for Oily Hair: Redken Volume Injection Shampoo, $27.

What influences hair thickness?

Factors other than genetics can also influence hair texture and thickness. Hormones, certain medications, and chemicals such as hair relaxers or perms can alter the characteristics of a person's hair. These changes can be temporary or permanent. Hair texture and thickness can also change with age.

Can thinned hair become thick again?

The good news is, in many cases, thin hair can be revitalised and regain density, depending on the underlying cause. To address thinning hair, it's crucial to understand what might be causing it. For some, it's a temporary effect of stress or nutrition, which can be relatively straightforward to correct.

Is hair thinning reversible?

You might be able to reverse hair loss, or at least slow it. With some conditions, such as patchy hair loss (alopecia areata), hair may regrow without treatment within a year. Treatments for hair loss include medications and surgery.

Does iron deficiency cause hair thinning?

Iron deficiency can cause hair loss and increased hair shedding. Hair loss from low iron isn't permanent. Your hair will start to grow back once your iron levels return to normal. Taking oral iron supplements can help get your iron stores back to normal.

What is your body lacking if your hair is thinning?

Vitamin D.

Vitamin D is essential for creating the cells that develop into hair follicles. It also supports healthy bones and your immune system. If you have hair loss and low vitamin D levels, your doctor may recommend vitamin D supplements.

What does thyroid hair loss look like?

Severe and prolonged hypothyroidism and hyperthyroidism can cause loss of hair. The loss is diffuse and involves the entire scalp rather than discrete areas. The hair appears uniformly sparse.

Why is my hair thin when its greasy?

Why Is My Hair Getting Thin and Greasy? When our hair follicles produce excess sebum, it can lead to blockages, inflammation, and hardened pores. This can result in thinning hair and increased hair loss, leaving you wondering why your locks are shedding faster than they can regrow.

At what age is your hair the thickest?

You start with "baby fine" hair that gets a lot thicker around puberty and continues to increase into your 30s; thickness then begins to decrease around your early 40s.

Can you use too much protein in your hair?

When you add an excessive amount of protein to your hair you're creating an intense barrier on your strands. Protein buildup like this can be a real problem as water and other moisturizing ingredients aren't able to penetrate the strand, leading to dry and dull hair that may feel limp and stiff.

Why did my hair get super thin all of a sudden?

Sudden hair loss can happen for various reasons, including stress, an underlying condition, and some medical treatments. Anyone who notices sudden, unexpected hair loss should seek medical advice.

Previous article
Why is hair so important to a woman?
Next article
How long after BBL can I sit without a pillow?