Few things are more alarming than noticing extra hair in the shower, on your pillow or tangled in your hairbrush. Hair loss can feel as though it comes out of nowhere, but in many cases it's the result of changes that have been happening beneath the surface for weeks or even months.
The good news is that not all hair loss is permanent. Understanding why your hair is falling out is the first step towards choosing the right treatment, and in many cases, taking action early can make a real difference.
Is it normal to lose hair every day?
Yes. Most people naturally lose between 50 and 100 hairs a day as part of the normal hair growth cycle. Each hair grows for several years before entering a resting phase and eventually shedding to make way for a new one.
Because we have around 100,000 hair follicles on the scalp, this daily shedding usually goes unnoticed.
The concern begins when more hairs are falling out than are growing back, or when new hairs return thinner and weaker than before. Over time, this can lead to visible thinning, a widening parting or a receding hairline.
1. Genetic hair loss
The most common cause of hair loss is genetics.
Known as androgenetic alopecia, this affects both men and women. In men it often begins with a receding hairline or thinning around the crown, while women are more likely to notice diffuse thinning across the top of the scalp.
The condition develops gradually as susceptible hair follicles become increasingly sensitive to DHT, a hormone derived from testosterone. Over time the follicles shrink, producing finer hairs until growth eventually stops altogether.
Early intervention offers the best chance of slowing this process.
2. Stress
Periods of emotional or physical stress can trigger excessive shedding, often several months after the stressful event has passed.
This condition, known as telogen effluvium, can occur following bereavement, surgery, illness, exams, relationship breakdowns or significant work-related stress.
Although the amount of shedding can be alarming, the follicles usually remain healthy, and hair often begins to recover once the underlying trigger has passed.
3. Poor nutrition
Hair is one of the fastest-growing tissues in the body, meaning it requires a consistent supply of nutrients.
Crash dieting, restrictive eating plans or poor overall nutrition can all affect hair growth.
Protein, iron, zinc, biotin and several vitamins play important roles in maintaining healthy follicles. If nutritional deficiencies develop, hair quality often suffers long before other symptoms become obvious.
4. Iron deficiency
Low iron levels are one of the most common nutritional causes of hair loss, particularly in women.
Iron helps carry oxygen to tissues throughout the body, including the hair follicles. When levels become depleted, follicles may enter the resting phase prematurely, leading to increased shedding.
A simple blood test can usually determine whether iron deficiency is contributing.
5. Hormonal changes
Hormones have a profound influence on hair growth.
Pregnancy, childbirth, menopause and changes in contraceptive medication can all alter hormone levels enough to affect the hair cycle. In many cases, shedding is temporary, although some women may experience more persistent thinning during menopause.
6. Thyroid disorders
Thyroid hair loss is quite common. Both an underactive and overactive thyroid can interfere with normal hair growth.
Hair often becomes thinner, drier and more brittle, while eyebrows may also lose density. Treating the underlying thyroid condition frequently improves hair growth over time.
7. Certain medications
Some prescription medicines list hair loss as a potential side effect.
These may include certain blood pressure medications, antidepressants, anticoagulants, acne treatments and chemotherapy drugs.
Never stop prescribed medication without speaking to your healthcare professional, but if you notice increased shedding after starting a new treatment, it's worth discussing with your doctor.
8. Rapid weight loss
Losing weight too quickly places the body under significant stress. Weight loss can even cause hair loss.
Whether through illness, surgery or extreme dieting, rapid weight loss can temporarily divert resources away from non-essential functions like hair production, resulting in noticeable shedding several months later.
9. Ageing
As we grow older, hair naturally changes.
Individual hairs often become finer, growth slows and overall density gradually decreases. While ageing cannot be prevented, maintaining good scalp health and supporting healthy follicles may help preserve hair quality for longer.
10. Tight hairstyles
Regularly wearing tight ponytails, braids or extensions can place repeated tension on the hair follicles.
Over time this may lead to traction alopecia, a type of hair loss that can become permanent if the pulling continues for years.
Looser hairstyles give follicles the chance to recover.
11. Scalp conditions
A healthy scalp is essential for healthy hair.
Conditions such as seborrhoeic dermatitis, psoriasis, fungal infections and chronic inflammation may all interfere with normal hair growth if left untreated.
Persistent itching, redness or excessive flaking should be assessed by a healthcare professional.
12. Polycystic Ovary Syndrome (PCOS)
PCOS affects hormone balance and can increase androgen levels in women.
As a result, some women develop thinning across the scalp while also experiencing acne, irregular periods or increased facial hair growth.
Managing the underlying hormonal imbalance is often key to improving hair health.
13. Smoking
Smoking affects circulation throughout the body, including the tiny blood vessels supplying the scalp.
Research has linked smoking with an increased risk of androgenetic alopecia, while the oxidative stress caused by smoking may also accelerate follicle ageing.
14. Autoimmune conditions
Certain autoimmune diseases can cause the immune system to attack healthy hair follicles.
Alopecia areata typically appears as smooth, circular patches of hair loss, although more extensive forms also exist.
Treatment depends on the severity and underlying cause.
15. Seasonal shedding
Some people notice seasonal hair loss during late summer and autumn.
While researchers are still investigating exactly why this occurs, seasonal fluctuations in the hair growth cycle appear to affect some individuals more than others.
The increase is usually temporary.
16. Excessive heat and chemical treatments
Frequent bleaching, colouring, straightening and excessive heat styling won't usually damage the follicle itself, but they can weaken the hair shaft, causing breakage that gives the appearance of hair loss.
Reducing heat exposure and using gentler hair care products may help minimise damage.
17. Underlying medical conditions
Occasionally, hair loss can signal an underlying health issue.
Chronic illnesses, nutritional disorders, autoimmune diseases and certain infections may all contribute to excessive shedding or thinning.
If hair loss develops suddenly, occurs in patches, is accompanied by pain or scalp changes, or continues to worsen, seeking medical advice is important.
What can you do if your hair is falling out?
The most effective treatment depends entirely on the underlying cause.
For some people, improving nutrition, reducing stress or correcting a vitamin deficiency may allow normal hair growth to resume naturally. Others may benefit from medical treatments, hair restoration procedures or lifestyle changes.
The key is avoiding guesswork. Hair loss is not a single condition, but a symptom with many possible causes.
If you're unsure why your hair is thinning, speaking with an experienced hair restoration specialist can help identify the most appropriate next steps before significant follicle miniaturisation occurs.
Can supplements help?
If your diet is lacking key nutrients or you're looking to support healthy hair growth alongside other treatments, a high-quality supplement may form part of a broader hair care routine.
One example is HR23+ Hair Growth Supplement, which combines carefully selected botanical extracts including saw palmetto, nettle leaf, pumpkin seed (pepita) and horsetail alongside targeted nutrients chosen specifically for hair health. While no supplement can overcome every cause of hair loss on its own, nutritional support may help create an environment that encourages healthier hair growth when used consistently.
The bottom line
Hair loss can be frustrating, but it's rarely something that should simply be ignored. Whether it's genetics, stress, hormonal changes, nutritional deficiencies or another underlying factor, identifying the cause is the first step towards finding an effective solution.
The earlier you understand what's happening, the more treatment options are likely to be available. If you've noticed ongoing thinning or increased shedding, don't wait until the problem becomes more advanced. Taking action today could make all the difference to the health of your hair tomorrow.
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