Excessive hair growth (Hirsutism)

Created: 09.01.2025

Updated 09.01.2025

Approved by: Consultant Dermatologist, Dr James Denny

What is Hirsurtism?

Hirsurtism is the medical term for excessive hair growth. There are many different reasons why hair can be unwanted or problematic. For some people, this can be due to increased hair growth as a result of Polycystic Ovarian Syndrome (PCOS) in women.

If a woman experiences abnormally increased hair growth, for example on the tummy or face. This can have several underlying causes. In some of the cases, there is no identifiable cause (idiopathic hirsutism). Often, it is genetically linked and can be more common in specific ethnic groups.

The second most common cause of hirsutism is Polycystic Ovary Syndrome (PCOS). This is a condition characterised by changes in the ovaries that disrupt the normal hormonal balance. The condition affects an estimated 8–13% of women of reproductive age. PCOS causes more than 70% of cases of hirsutism.

What are the symptoms?

The primary symptom of hirsutism is the growth of coarse, dark hair in areas where women typically have fine or no hair, including the upper lip, chin, chest, and back. This excessive hair growth may develop gradually or suddenly, depending on the underlying cause. In some cases, women may also experience other signs of excess androgen, such as acne, thinning hair on the scalp, or an enlarged clitoris.

What are the treatments?

There are many different ways to remove hair. Traditionally, it has been common to do so by using various forms of shaving, plucking, waxing, or using hair removal creams. The disadvantage of these methods is that the hairs grow back after a short time, so the process needs to be repeated often. In addition, several of the mentioned methods can be perceived as painful and/or cause skin irritations. For more permanent removal, a laser can be a good alternative.

What is the Prognosis?

The prognosis for hirsutism depends on the underlying cause and the effectiveness of treatment. While the condition is often manageable, it is typically chronic, requiring ongoing treatment to control hair growth. Many women find significant improvement with medication and hair removal methods, though complete resolution may not be possible. With proper management, most women can effectively reduce symptoms and improve their quality of life.