Causes of Losing Body Hair

Understanding Body Hair Loss

Most people think of hair loss as something that affects the scalp. Thinning hair, receding hairlines, and bald patches are common concerns for both men and women. But some people experience hair loss across other parts of the body, and this can be just as distressing.

Body hair loss can affect the eyebrows, eyelashes, arms, legs, chest, and other areas. For some, the change is subtle: hair becomes finer or grows more slowly. For others, hair may disappear entirely from certain areas.

This type of hair loss is less talked about than scalp hair loss, which can make it feel more isolating. Understanding what might be causing it is a useful first step before seeking advice or treatment.

Common Causes of Body Hair Loss

Several conditions and factors can lead to a reduction in body hair. The cause often determines whether the hair loss is temporary or permanent, and which areas of the body are affected.

• Alopecia areata: This autoimmune condition causes the immune system to attack hair follicles, typically resulting in patchy hair loss. It can affect the scalp alone, but in some cases it spreads to body hair. Alopecia totalis causes complete scalp hair loss, while alopecia universalis results in complete hair loss across the entire body.
• Hormonal changes: Shifts in hormone levels can affect hair growth. The menopause, thyroid disorders, and conditions affecting the adrenal glands may all play a role. Changes in androgen levels can influence body hair patterns, and low testosterone in men can reduce body hair over time.
• Thyroid problems: Both an underactive and overactive thyroid can cause changes to hair growth. Hair typically becomes diffusely thinner rather than falling out in distinct patches. The NHS provides information on thyroid conditions and their symptoms.
• Medications: Certain drugs, including chemotherapy treatments, can cause widespread hair loss. Some medications for blood pressure, depression, and arthritis may also affect hair growth as a side effect.
• Nutritional deficiencies: A lack of iron, zinc, or protein in your diet can contribute to hair thinning. Addressing the deficiency may help hair regrow, though results vary between individuals.
• Stress and illness: Significant physical or emotional stress can trigger telogen effluvium, a condition that causes temporary hair shedding. Chronic illness or severe weight loss can also affect hair health across the body.
• Ageing and genetics: It is normal for body hair to become finer and sparser with age. Genetic factors also influence how much body hair you have and how it changes over time.
• Skin conditions: Eczema, psoriasis, and fungal infections can damage hair follicles and lead to localised hair loss on the body.

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Temporary or Permanent Loss

Whether body hair loss is reversible depends largely on the underlying cause. Hair loss triggered by stress, medication, or nutritional problems will often resolve once the trigger is removed or treated. This can take several months, as hair regrowth is a slow process.

In other cases, the loss may be permanent. Severe autoimmune conditions or scarring of the hair follicles can prevent regrowth entirely. Consulting a GP or dermatologist can provide clarity on the underlying causes and potential treatment options.

When to Seek Advice

If you have noticed a change in your body hair, it is worth speaking to a healthcare professional. This is especially true if the hair loss has come on suddenly, is spreading, or is accompanied by other symptoms such as fatigue, weight changes, or skin problems.

Your GP can arrange blood tests to check for hormonal imbalances, thyroid function, and nutritional deficiencies. They may also refer you to a dermatologist if a skin condition or autoimmune disorder is suspected.

Organisations such as Alopecia UK offer support and information for people experiencing hair loss, including body hair loss. Their resources can be helpful if you are looking for practical advice or want to connect with others in similar situations.

Body hair loss can feel unsettling, but in many cases there are ways to manage or treat it. Getting a proper diagnosis is the first step towards finding the right approach for you.